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The Sonar — Something for Everybody
The 23' Sonar one-design keelboat is a high-performance racer and also a comfortable daysailor just right for getting the entire family or friends on the water together. It was designed by Bruce Kirby and almost 700 boats have been built since 1980. The Sonar has recently achieved status as an International Class.
Performance
- Race competitively with three or four crew.
- The Sonar surfs and planes readily downwind.
- Well-balanced, inboard rudder.
- Faster than a J/24 in windy conditions.
- Strict one-design rules.
- Clean and uncluttered cockpit.
- Small jib can be handled by nearly any size crew member.
- Single jib, main, and spinnaker.
- 7'10" beam for easy trailering.
- 11'6" cockpit seats 8 comfortably.
- Full-length molded bench seats with angled backs.
- Self-bailing cockpit.
- Lockable cuddy under the foredeck holds gear, or an outboard motor, even a small Porta Potti.
- 900 lb. keel keeps the boat stable and dry.
View the complete specifications.
Fin w/spade rudder
Specifications SONAR
Home - Sailboat Listings 1980 - 23.00 ft / 7.01 m - Bruce Kirby - Seidelman
SONAR Sailboat Data
Hull Type: Fin w/spade rudder Rigging Type: Fractional Sloop LOA: 23.00 ft / 7.01 m LWL: 19.92 ft / 6.07 m S.A. (reported): 265.00 ft² / 24.62 m² Beam: 7.83 ft / 2.39 m Displacement: 2,100.00 lb / 953 kg Ballast: 930.00 lb / 422 kg Max Draft: 3.92 ft / 1.19 m Construction: FG Ballast Type: Lead First Built: 1980 # Built: 860 Builder: Seidelman Designer: Bruce Kirby
Information from sailboatdata.com .
Hull Speed: 5.98 kn
Rondar Sonar Now a World Sailing Class!
- Sparkling Performance
- Self draining cockpit
- Deep keel for stability
- Deep rudder for control in all weather
- 75% fractional rig, Dacron Sails
- Slipway Launch
- Easy launch, easy tow, easy trailed
- All the family can sail and race
- Ideal for sail and race training
- Low maintenance
- Easily adaptable for all disabled sailors
- Sail and storage bow cuddy
- Race competitively with three or four crew.
- The Sonar surfs and planes readily downwind.
- Well-balanced, inboard rudder.
- Faster than a J/24 in windy conditions.
- Strict one-design rules.
- Clean and uncluttered cockpit.
- Small jib can be handled by nearly any size crew member.
- Single jib, main, and spinnaker.
- 7'10" beam for easy trailering.
- 11'6" cockpit seats 8 comfortably.
- Full-length molded bench seats with angled backs.
- Self-bailing cockpit.
- Lockable cuddy under the foredeck holds gear, or an outboard motor, even a small Porta Potti.
- 900 lb. keel keeps the boat stable and dry.
Rondar Raceboats
| +44 (0) 7811957649 |
Sonar Class Association
Class contact information.
Click below
Class Email
Class Website
One-Design Class Type: Keelboat
Was this boat built to be sailed by youth or adults? Both
Approximately how many class members do you have? 200
Photo Credit:Chandra Wobschall
Photo Credit:
About Sonar Class Association
One design keelboat designed by Bruce Kirby in 1979. Active fleets in Midwest and Eastern US as well as western Europe
Boats Produced: approx 850
Class boat builder(s):
Siedelman, Ryder, Ontario,Rondar
Approximately how many boats are in the USA/North America? 400
Where is your One-Design class typically sailed in the USA? List regions of the country:
USA, Ireland, UK, EU
Does this class have a spinnaker or gennaker? Yes
How many people sail as a crew including the helm? 4
Ideal combined weight of range of crew: 750
Boat Designed in 1979
Length (feet/inches): 23′
Weight of rigged boat without sails: 2200
Draft: 3′ 7”
Mast Height: 35
Back to One-Design Central
Copyright ©2018-2024 United States Sailing Association. All rights reserved. US Sailing is a 501(c)3 organization. Website designed & developed by Design Principles, Inc. -->
The Sonar is a 23.0ft fractional sloop designed by Bruce Kirby and built in fiberglass by Seidelmann Yachts since 1980.
860 units have been built..
The Sonar is a light sailboat which is a very high performer. It is very stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat.
Sonar for sale elsewhere on the web:
Main features
| Model | Sonar | ||
| Length | 23 ft | ||
| Beam | 7.83 ft | ||
| Draft | 3.92 ft | ||
| Country | United states (North America) | ||
| Estimated price | $ 0 | ?? |
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| Sail area / displ. | 25.92 | ||
| Ballast / displ. | 44.29 % | ||
| Displ. / length | 118.61 | ||
| Comfort ratio | 10.04 | ||
| Capsize | 2.45 |
| Hull type | Monohull fin keel with spade rudder | ||
| Construction | Fiberglass | ||
| Waterline length | 19.92 ft | ||
| Maximum draft | 3.92 ft | ||
| Displacement | 2100 lbs | ||
| Ballast | 930 lbs | ||
| Hull speed | 5.98 knots |
We help you build your own hydraulic steering system - Lecomble & Schmitt
| Rigging | Fractional Sloop | ||
| Sail area (100%) | 265 sq.ft | ||
| Air draft | 0 ft | ?? | |
| Sail area fore | 111.25 sq.ft | ||
| Sail area main | 154 sq.ft | ||
| I | 25 ft | ||
| J | 8.90 ft | ||
| P | 27.50 ft | ||
| E | 11.20 ft |
| Nb engines | 1 | ||
| Total power | 0 HP | ||
| Fuel capacity | 0 gals |
Accommodations
| Water capacity | 0 gals | ||
| Headroom | 0 ft | ||
| Nb of cabins | 0 | ||
| Nb of berths | 0 | ||
| Nb heads | 0 |
Builder data
| Builder | Seidelmann Yachts | ||
| Designer | Bruce Kirby | ||
| First built | 1980 | ||
| Last built | 0 | ?? | |
| Number built | 860 |
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What kind of sailboat is a Sonar , and what are the features of this boat?
Sonars are a triple handed keelboat raced by both adaptive and able bodied sailors. The Sonar is used by sailors who enjoy a team mentality, who are often interested in racing in addition to cruising. The Sonar has a mileu of possible adaptions. Several are described below.
The video below shows both a transfer bench and an swiveling adapted Sonar seat (although the sound quality is poor),
The Sip and Puff joystick steering system is an option that helps individuals with limited mobility steer the Sonar. Find information on what a Sip and Puff system is, and where to purchase one.
Other adaptions include Stability bars and drop in seats are also used in tandem in the Sonar to help crew and skipper move from side to side as the boat sails.
Sonars also have different seating options, including:
- Mid-Boat Seat : This seat is installed towards the center of the Sonar and is designed to accomodate individuals using Sip and Puff systems. The seat can be positioned from side to side using cleats.
- Gimbaled Mid-Boat Seat : The gimbaled seat sits lower in the boat and swivels to keep the Skipper upright as the boat heels.
- For general information, and to purchase a Sonar, visit Rondar Raceboats .
- Other possible adaptions include changing the main sheet purchase and the location of the mainsheet block. Purchase adjustments are covered on page 50 of US Sailing's Adaptive Sailing Resource Manual .
Categories: Adaptive Resource Library Types of Boats
- Adaptive Resource Library
- Example Adaptions
- Sitting in the Sailboat
- Steering the Sailboat
- Transfering Into the Sailboat
- US Sailing Resources and Accreditation
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- Where to start?
Adaptive Resource Query Form
Let us know if you have questions, or if a question has gone unanswered! We will endeavor to find an answer for you and your program.
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Clagett Sailing
231 Indian Avenue, Portsmouth, RI 02871 Phone: (401) 846-4470 Email: [email protected]
Copyright 2024, Clagett Sailing. All rights reserved | Website by Morweb.org
We have 10 Sonars to choose from: Queen Liz, Zoe V, Ellie, Laurie, Free Spirit, Escape, Happy Hours, Belle....
The Sonar offers something for everybody: it is a performance racer and a comfortable day-sailor, seating 5 adults.
The Sonar 23 is our primary teaching boat for beginners, and the boat we use for evening races.
Learn to sail on a Sonar or rent a boat to enjoy the water!
The Sonar is a 7 m (23 ft) one-design keelboat for up to five people. It is Bermuda-rigged , with a large mainsail and a 100% jib . The class is recognized by the International Sailing Federation .
The Sonar was designed in 1979 by Bruce Kirby , designer of the popular Laser dinghy. Since then, over 800 boats have been built. Most of the fleet is in the USA, with smaller fleets in Britain and Canada.
Did you know?
The Sonar showcased disabled sailing at the 1996 Paralympic Games where the sport was a demonstration event with just the Sonar. She has been the three person keelboat at every subsequent Paralympics . The Sonar is well suited for disabled sailing because of its large open cockpit making adaptations easy.
Port Sailing Sonar 23 Fleet
The most flexible sail boat, praised by beginners and racers alike.
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Any sonar 23 info?
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I'm interested in the sonar 23. Anyone own one of these? I'd love to know about its construction, performance, etc. Cheers
I don't own one, but have sailed on one many times. Good little boats, and a lot of fun. You can read more about them here and here .
Thanks for the info. I'd like to know more about the boat's construction materials and techniques if anyone can help there.
There's one at our club. If I see the guy, I'll tell him about this thread.
Hull Hand laid up woven fiberglass with coremat coring for added strength and impact resistance. Each boat carefully crafted to meet one-design rules. White gelcoat standard; custom hull gelcoat colors and bottom paint optional. Deck Fabricated as one-piece insert; includes three seat storage lockers. Two bunks (and space for a small Porta Potti) in lockable cuddy cabin with hatchboard. Extruded aluminum toerail bolted thru deck and hull flange. Cockpit Huge 11'6" self-bailing cockpit with full-length seats, angled seatbacks. Seats 8 adults in comfort. Adjustable mainsheet traveler amidships. Keel 900 pounds of cast lead, deep fin design. Narrow, with advanced foil shape for superior windward performance. Optional sling available for hoist launching. Rudder 2" thick, very high-aspect and deep. Balanced design and large area provides excellent control and manueverability, even under spinnaker in strong winds. Inboard hung for protection and to retain the same light feel at all angles of heel. Laminated curved tiller. Rigging Bendy tapered aluminum mast. 75% fractional rig is responsive, makes sailhandling easier. Elliptical mast section is keel stepped. Swept spreaders, adjustable backstay and moveable mast blocking at the partners permit fine tuning. Running rigging is Dacron and Spectra, cut to length and fitted for each application. Sails Large Dacron mainsail and 100% jib, legal for class racing. Combination of larger main and smaller jib is easier to handle when tacking. Standard cunningham, outhaul, traveler controls and jib leads provide complete sail-shaping ability. Spinnaker and tapered aluminum pole available. Hardware Boat is shipped "race ready," equipped with top-quality marine hardware -- Harken, Ronstan, etc. Deck and cockpit fittings are mounted with stainless steel hardware. Click to expand...
I really love these boats. (I also really like the J-22 equally). One word of caution, at least on the early boats that I sailed, I think that the cockpit was not truely self-bailing. My recollection was that the cockpit has an Elstrom type bailer that had to be opened to drain the cockpit only when the boat was at speed. This means using a boom tent and bailing the cockpit something of a necessity if they are stored in the water. Jeff
Sonar Hey AK, The Sonar is the second best keelboat trainer out there. Colgate 26 being the best. We have used Sonars exclusively in our operation since 1997 to train >800 sailors. It is a day sailor racer and nothing more. Pros; very simple rig at the basic level, huge comfortable cockpit, most manueverable, they love wind and are fast. Very easy to learn at the beginner level. Cons; designed to be dry sailed, wet boat in chop/wind due to low freeboard, water ingress at the partners is annoying, Elvstrom bailers need maintenance requiring haul, zero amenities (guys are ok with this...) Want to know more send me a note and I will be glad to help. I have sailed these for the last 10 years so I have a fair idea what kind of boat they are. BTW they are back in production both in NA and Europe. Regards, Red
Google Ontario Yachts, they build them.
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1978 Sonar Restoration by Shumway Marine
1978 Sonar Sailboat – Awaiting Restoration
Late last fall we sold a 1978 Sonar to Skip Shumway of Shumway Marine . The boat was in pretty tough shape. The blue gel coat had faded to a chalky hue. The black anodized mast had rubbed through to the bare aluminum. The rudder and keel were both a mess in each their own unique way, and the interior was pretty much shot.
We were certain that for the right buyer, though, we had a diamond in the rough. The Sonar is a great daysailer and racer, and we are glad to announce that this one is back!
Take a look at the after picture!
As the Shumway crew puts on the finishing touches, this boat is actively for sale. Interested ? Contact Shumway Marine through their contact page .
About Shumway Marine:
From delicate rowing shells to 65 foot yachts, Shumway Marine can repair it all. Our experienced craftsmen work with wood and fiberglass for structural or cosmetic repairs .
Our certified mechanics work on Mercruiser, Yanmar, Westerbeke and Universal engines. Electrical wiring work and custom rigging are also available. We have two 40 ton hoists and offer yacht loading and unloading for transport.
1978 Sonar Sailboat – After
The Paint Shop can accomodate up to 45′ boats. Our painters are skilled in using Awlgrip , Imron , and gelcoat for refinishing. Blister repair, bottom painting, and doll-ups are also done through our Paint Shop.
About the Sonar Sailboat:
The 23′ Sonar one-design keelboat is a high-performance racer and also a comfortable daysailor just right for getting the entire family or friends on the water together. It was designed by Bruce Kirby and almost 700 boats have been built since 1980. The Sonar has recently achieved status as an International Class.
Performance
- Race competitively with three or four crew.
- The Sonar surfs and planes readily downwind.
- Well-balanced, inboard rudder
- Faster than a J/24 in windy conditions.
- Strict one-design rules.
- Clean and uncluttered cockpit.
- Small jib can be handled by nearly any size crew member.
- Single jib, main, and spinnaker.
- 7’10” beam for easy trailering.
- 11’6″ cockpit seats 8 comfortably.
- Full-length molded bench seats with angled backs.
- Self-bailing cockpit.
- Lockable cuddy under the foredeck holds gear, or an outboard motor, even a small Porta Potti.
- 900 lb. keel keeps the boat stable and dry.
Origin of the Sonar:
“The Sonar may well be the best boat I’ve ever designed.” – Bruce Kirby
It started when Bruce Kirby’s home club (Noroton Yacht Club, Darien, CT USA) couldn’t find the right boat to get their members involved in club racing; fewer and fewer of its members were participating.
They studied a great many existing classes of boats but all were considered too expensive, too slow, too demanding to sail, or just plain uncomfortable. So Bruce was asked to design a new boat specifically to meet the requirements of a club racing one-design keelboat fleet.
The result was the Sonar. The Noroton Yacht Club got every thing they wanted and more. And the Sonar has been greeted with enthusiasm by individuals and clubs all over the world.
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Shoreline Sailboats always has an interest in buying used sailboats. If you have a boat for sale, contact us using the form below:
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When the Sonar was designed and orders were taken for the first fleet of boats at Noroton Yacht Club, in Darien, Connecticut, the original fleet members recognized a need to create an organization with a Constitution, By-laws and Class Rules that control the growth of the class. Early membership was just a few key people, but these people had a passion for this new and very special boat and their passion spread as new fleets sprang up around North America. Early membership grew at a rapid pace as boats were built. Sonars worldwide now number over 700 with fleets in over six countries.
The Sonar was selected as the three-person Paralympic keelboat beginning in 2000.
Membership in the organization is open to all who own or love to sail on Sonars. Becoming a member is easy, just go to the Membership page of this website where you will find all the information you will need and an online registration form.
Reasons to join the Sonar Class Association
Sonar starting line
- Coordinate Sonar Events and communicate details to members through the website and email
- Provide representation in US and World Sailing organizations
- Safeguard Class assets (including scales, measurement templates/tools)
- Keep our website running
- Get Sonar specific maintenance and racing tips
- Maintain the value of your Sonar as One-Design racer
- Support member volunteers who organize fleets, set up regattas, publish results, measure boats, and otherwise contribute their time on behalf of all Sonar sailors
Where do my Class dues go:
- Pay an Administrator responsible for collecting membership and royalty tag fees, maintain membership information, administer the website, organize Class meetings, communicate with sailing governing bodies
- Procure and maintain measurement equipment and when needed, ship the equipment to Championship venus
- Hosting sonar.org
- To create this great new website that will highlight the Sonar for current and potential owners
What would the Sonar be without the Sonar Class association? Just another small day-sailing keelboat!
Click here to join the class association now.
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- Sailboat Guide
1985 23' Sonar
- Description
Seller's Description
Hull #328. I refurbished this Sonar for two years and it has been in storage since. Time for someone else to take up the cause. The hull has been stripped, barrier coated (5 coats) and finished with VC 17. This is a solid Sonar. No soft spots in the hull or deck. The keel box is solid. I dropped and sealed the keel. The rudder post has been reworked and has no wobble. The following items are new: jib and main halyards, main sail, cockpit handholds, LED cabin and bow nav light, Signet knot meter.bailer gaskets Roller furling jib with two spinnakers (one race and one cruise w sock) spinnaker pole The trailer has been sanded, primed and painted. It has no lights on it. the trailer is road worthy
Rig and Sails
Auxilary power, accomodations, calculations.
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL
Sail Area / Displacement Ratio
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64) 2/3
- SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
- D : Displacement in pounds.
Ballast / Displacement Ratio
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
Displacement / Length Ratio
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
- D: Displacement of the boat in pounds.
- LWL: Waterline length in feet
Comfort Ratio
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )
- D: Displacement of the boat in pounds
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
Capsize Screening Formula
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
Commissioned by members of Noroton YC of Darien CT USA and first built by Seidelmann Yachts. A few were also built by Carbon Index in the UK. Current builder (2019) is Rondar Raceboats.
This listing is presented by SailboatListings.com . Visit their website for more information or to contact the seller.
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Sonar Parts
West Coast Sailing is your source for Sonar sailboat parts, rigging and accessories. The 23-foot Sonar is popular for its combination of comfort, speed, and ease of handling. This trailerable Bermuda rig, sailed by a crew of 3 to 5, seats up to 8 people and has a deep keel for stability. The Sonar's generous cockpit appealed to both disabled and able-bodied sailors. It became Europe's first Paralympic sailing class in 1996. The American Sailboat Hall of Fame inducted the Sonar in 2000 as a boat that is friendly to new sailors, exciting for club racers, and fun for day sailing. Shop Sonar sailboat parts, rigging, and accessories today with rigging guides, technical information, extensive selection, and fast shipping to help you get back out on the water.
- Qty in Cart
Harken 22 mm Traveler Car w/ Stand-Up Toggle
Harken 22 mm High-Beam Heavy Duty Track Ends
Harken Cam Cleat Swivel Base w/ 150 Aluminum Cam
Harken 29 mm Carbo Triple Block w/ Becket
Harken 75 mm Rachet Cheek Block
Harken Micro Cam Cleat H471
Harken 40 mm Carbo Fiddle Block H2655
Harken Aluminum Cam Cleat H150
Ronstan Medium Cam Cleat (Grey)
Harken 29 mm Single Block w/ Becket H341
Harken 40 mm Single Block H2636
Ronstan 40 mm All Purpose Single Block
Ronstan 40 mm All Purpose Single Block w/ Becket
Harken 57 mm Ratchet Block H2135
Frederiksen 60 mm Ratchet Block
Harken 29 mm Triple Block H344
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Rigging diagram.
Use the diagram below to reference Harken part numbers to appropriate application on your Sonar sailboat. Parts recommendations are offered as a guide for common applications.
Jib Halyard Fine-Tune
This high-power jib halyard fine-tune allows you to tension the luff as the wind cranks up. When you need headstay sag to power up the jib in chop and light air, the fine-tune allows quick control over headstay tension, making it easier to insert mast chocks.
Mainsheet Bridle
Upgrading to a bridle can make your system self-tacking in 10-20 knots and downwind while reducing the adjustments needed in other wind ranges. Simply add a second low-friction Harken 2731 car and use Spectra® strops about 28 inches long. The length of the bridle straps is key so you can sheet in hard to center the boom without closing off the leach.
Jib Sheet Coarse/Fine-Tune
This hand-trimmed 6:1 system has a gross-trim for speed in quick tacks and a fine-tune for precise, fingertip control in any breeze.
Diagram provided by Harken. West Coast Sailing is an approved seller of Harken sailboat hardware.
Looking for other sailboat parts or gear? We can help!
General Parts & Hardware - We offer a huge selection of General Parts including hardware, blocks, cleats, shackles, accessories and more here .
Line - Great options for halyards, sheets, control lines, and rigging in a wide range of diameters and materials available on our Line page .
Apparel & Accessories - We also offer large range of Apparel and Accessories from all of your favorite sailing brands.
Product Suggestions - If you're looking for a specific part for your Sonar sailboat that you cannot find, let us know. We are actively working to expand our one design parts offering and welcome your input for parts you think we should be stocking to make it easier for you to get back out on the water. Submit you idea via our Product Suggestion Form (opens in new tab).
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COMMENTS
A Ballast/Displacement ratio of 40 or more translates into a stiffer, more powerful boat that will be better able to stand up to the wind. Bal./Disp = ballast (lbs)/ displacement (lbs)*100 Disp./Len.: The lower a boat's Displacement/Length (LWL) ratio, the less power it takes to drive the boat to its nominal hull speed. less than 100 ...
Boat; Specs; LOA: 23'0″ - 7.0m LWL: 19'11" - 6.1m BEAM: 7'10" - 2.4m DRAFT: 3'11" - 1.2m DISP: 2100lb - 950kg BALLAST: 900lb - 408kg MAIN & JIB: 250 sq.ft - 23.2 sq.m SPIN: 245 sq.ft - 22.8 sq.m. Sonar Class Association Connecticut (USA) Categories. News; Uncategorized; Recent Posts. Brian Doyle Wins Sonar 2023 ...
The Sonar is a one design trailerable racing sailboat that was designed by Canadian naval architect Bruce Kirby and first built in 1980. [1] [2] [3]The design was initiated as a commission from the members of the Noroton Yacht Club of Darien, Connecticut, United States. [1]The Sonar was inducted into the American Sailboat Hall of Fame in 2004. [4]The design was developed into the more cruising ...
Shumway Marine specifications and pricing for Sonar Sailboats. Located in Rochester, New York on the Genesee River near Lake Ontario. Get Directions. Home; Store; ... Length Overall (LOA) 23' Displacement: 2,100 lbs. Waterline Length: 19'11" Ballast: 900 lbs. Maximum Beam: ... Each boat carefully crafted to meet one-design rules. White gelcoat ...
Sonar is a 22′ 11″ / 7 m monohull sailboat designed by Bruce Kirby and built by Rondar Raceboats, Shumway Marine, Seidelmann Yachts, Ontario Yachts, C. E. Ryder, and DS Yachts (Schwill Yachts) starting in 1980. ... A measure of the weight of the boat relative to it's length at the waterline. The higher a boat's D/L ratio, the more easily ...
900 lb. keel keeps the boat stable and dry. View the complete specifications. Located on Southern Lake Ontario in Rochester, New York : 585-342-3030 or 800-433-2518 : | | | | | | |. Shumway Marine is the exclusive US distributor of Sonar sailboats. The boat is now in international distribution.
SONAR Sailboat Data Hull Type: Fin w/spade rudder Rigging Type: Fractional Sloop LOA: 23.00 ft / 7.01 m LWL: 19.92 ft / 6.07 m S.A. (reported): 265.00 ft² / 24.62 m² Beam: 7.83 ft / 2.39 m Displacement: 2,100.00 lb / 953 kg Ballast: 930.00 lb / 422 kg Max Draft: 3.92 ft / 1.19 m Construction: FG Ballast Type: Lead First Built: 1980 # Built ...
Rondar Sonar. Now a World Sailing Class! The 23' Sonar one-design keelboat is a high-performance racer and also a comfortable daysailor just right for getting the entire family or friends on the water together. It was designed by Bruce Kirby and almost 700 boats have been built since 1980. The Sonar has recently achieved status as an ...
About Sonar Class Association. One design keelboat designed by Bruce Kirby in 1979. ... Length (feet/inches): 23′ Beam: 7. Weight of rigged boat without sails: 2200. Draft: ...
The Sonar is a 23.0ft fractional sloop designed by Bruce Kirby and built in fiberglass by Seidelmann Yachts since 1980. 860 units have been built. The Sonar is a light sailboat which is a very high performer. It is very stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat.
The Sonar answers the question; you can have a sparkling performance with comfort! This 23-foot daysailer has a beautifully contoured sit-in cockpit that would suit a 35-foot cruising boat, and when the wind comes up and you're sitting on the side deck, you will find that there is no tendency to fall forward into the boat unless she takes a ...
Sonars are a triple handed keelboat raced by both adaptive and able bodied sailors. The Sonar is used by sailors who enjoy a team mentality, who are often interested in racing in addition to cruising. The Sonar has a mileu of possible adaptions. Several are described below. The video below shows both a transfer bench and an swiveling adapted ...
SONAR CLASS ASSOCIATION. CLASS RULES v1.13 Effective June 10, 2015. ... One paddle or oar extendable to at least 1.5 m in length. (b) Optional (i) Mooring lines and towing ropes. (ii) One outboard engine and bracket. C.4 BOAT ... boat weight is less than the amount specified in section C.4.1. Corrector
The Sonar is a 7 m (23 ft) one-design keelboat for up to five people. It is Bermuda-rigged, with a large mainsail and a 100% jib.The class is recognized by the International Sailing Federation.. The Sonar was designed in 1979 by Bruce Kirby, designer of the popular Laser dinghy. Since then, over 800 boats have been built. Most of the fleet is in the USA, with smaller fleets in Britain and Canada.
Transmitting at 455kHz or 800kHz frequencies, scanning sonar provides high-resolution views to the sides (SideScan) and beneath (DownScan Imaging) the boat. 800kHz provides the sharpest resolution at shallower depths, while 455kHz delviers the best overall image quality and depth penetration. HDI. HDI is a transducer that combines a round ...
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps ... Cockpit Huge 11'6" self-bailing cockpit with full-length seats, angled seatbacks. Seats 8 adults in comfort. ... Sonar Hey AK, The Sonar is the second best keelboat trainer out there. Colgate 26 being the best.
About the Sonar Sailboat: The 23′ Sonar one-design keelboat is a high-performance racer and also a comfortable daysailor just right for getting the entire family or friends on the water together. It was designed by Bruce Kirby and almost 700 boats have been built since 1980. ... Full-length molded bench seats with angled backs. Self-bailing ...
Length. Beam. Draft. Location. Price. 1989. 23' 7.8' 3.9' Michigan. $5,000. Description: A completely restored Sonar One Design Sailboat. This boat has been completely repainted inside and out. This is a new like looking boat. Equipment: All new running rigging with two sets of North Sails. It has a trailer and all the safety equipment needed ...
Class - Sonar Class Association. Founded in 1980, the Sonar Class Association is the governing body for Sonar sailing worldwide. In 2000 the class obtained Recognized status with the World Sailing, the international governing body of the sport. When the Sonar was designed and orders were taken for the first fleet of boats at Noroton Yacht ...
This ratio assess how quickly and abruptly a boat's hull reacts to waves in a significant seaway, these being the elements of a boat's motion most likely to cause seasickness. Read more. Formula. Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33) D: Displacement of the boat in pounds; LWL: Waterline length in feet; LOA: Length ...
The 23-foot Sonar is popular for its combination of comfort, speed, and ease of handling. This trailerable Bermuda rig, sailed by a crew of 3 to 5, seats up to 8 people and has a deep keel for stability. The Sonar's generous cockpit appealed to both disabled and able-bodied sailors. It became Europe's first Paralympic sailing class in 1996.
Length. Beam. Draft. Location. Price. 1986. 23' 8.5' 4.5' Florida. $4,500. Description: Make an offer. This is an excellent 23ft modified Sonar day sailor that I am refitting. The modification is that this boat has a much larger cabin, an open stern for water runoff, flat and streamlined cockpit area, and a double spreader keel stepped mast ...
The Sonar was designed by Bruce Kirby, whose other work includes the popular Laser dinghy. ... to sail and does an excellent job combining comfort and performance. The huge, 11'6″ self-bailing cockpit has full-length seats with angled seatbacks. ... Our 75+ boat fleet features boats from 23 to 40 feet and spans 5 distinct membership ...
MLF is uniquely situated to govern intra-day usage of forward-facing and 360-degree sonar at the sport's highest level with its period structure and an official in every Bass Pro Tour boat. The league is also positioned to enforce day-by-day usage at the Tackle Warehouse Invitationals through POV cameras and a new, easy to install transducer ...