marstrom catamaran

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• Sailboat Guide

Marstrom 20

Marstrom 20 is a 20 ′ 0 ″ / 6.1 m catamaran sailboat designed by Goran Marström and built by Marstrom Composite AB between 2001 and 2005.

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)

Carbon spars Mast length 34.4’ Twin trapezes

Sail Area: Spinnaker type: Assymmetrical spinnaker on bowsprit Upwind sail area 237 sq.ft. Downwind sail area 474 sq.ft. Mainsail area 237 sq.ft. Spinnaker area 237 sq.ft.

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• About Sailboat Guide

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THE M32 ONE DESIGN

A 32 foot catamaran.

The M32 was first designed in 2011 by well known Swedish sailor Göran Marström, an Olympic bronze medallist at the 1980 Moscow Olympics, and a successful boat builder of catamarans since 1983 including the Tornado, M5 A-Class, M20 catamaran, and the Extreme 40.

WHAT OUR OWNERS THINK >

HÅKAN SVENSSON

Keen sailor and businessman.

In 2013, the design and production rights to the M32 were acquired by Swedish company Aston Harald AB, led by keen sailor and businessman Håkan Svensson. After sponsoring a number of high profile yachting projects including the Green Dragon and Puma Volvo Ocean Race teams, Svensson was introduced to the M32 by close friend and Olympic Gold medallist Freddy Lööf in 2012.

M32 SCANDINAVIAN SERIES

Regional professional sailing series.

In 2013, the M32 Scandinavian Series was created for the growing number of M32 owners and teams. The Series includes regattas in Sweden, Norway, Denmark and Finland in close to shore venues.

EXPANSION OF THE SERIES

The expanding M32 owner base has encouraged the setup of one-design fleet racing in sailing hotspots around the world, all unique to their local market. From iconic yacht clubs in North America, city centre competitions in Scandinavia, picturesque locations in the Mediterranean.

• M32 Academy

The M32 Academy is an educational platform for high-performance and apparent wind sail racing. From getting kids onboard for the first time to fine tuning Olympic sailors and introducing the M32 to new owners with different sailing backgrounds. The M32 catamaran has proved itself as the perfect tool to excite, educate and entertain.

THE INTERNATIONAL CLASS ASSOCIATION

The M32 International Class Association was introduced to give our owners and sailors a voice. The association has representatives from the builder and from around the world to ensure that M32 World global targets are in line with what our owners, sailors and partners are searching for. The class association maintains the one-design integrity of the class throughout the world.

CHAMPIONSHIP

The inaugural M32 World Championship was held in Marstrand, Sweden where 15 boats took to the start line in what was an epic spectacle. Following the huge success of the 2017 event and as interest in the class continues to develop with an annual World Championship as the major event of the season.

Are you interested to join the most exciting sailing in the world or maybe just want to have a chat about the boat?

North America Dave Doucett   +1 413 364 0067 | [email protected]

Europe Mattias Dahlstrom   +46 708 406 335 | [email protected]

Marström M20

Sailboat specifications.

• Last update: 20th March 2020

Marström M20's main features

Marström m20's main dimensions, marström m20's rig and sails, marström m20's performances, marström m20's auxiliary engine, marström m20's accommodations and layout.

Similar sailboats that may interest you:

• +46 (0)490 89580
• [email protected]

The HH 50 ( www.hhcatamarans.com ) is a high-performance Cruising Catamaran designed for voyaging with a couple, yet quick enough for the owner to enjoy social Caribbean racing.

While sporting a “standard” high performance Catamaran rig the HH will see a breakthrough in multihull mast jack design. Once the mast jack has replaced turnbuckles (possible with fibre rigging) the setup will be lighter than a rig which is tensioned conventionally with large parts of the mast jack system made in carbon fibre rather than alloy and stainless steel as per conventional designs. Halyard locks from Facnor simplifies handling and saves money on the deck.

ASK US - SUBSCRIBE QUOTE

Marstrom Composite is always open for questions. You can write your question to us 24/7. Submit a request for quote. Do you have any exciting project you wish to know more about how we can realize? Contact us now, we will return shortly with answers to you.

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Marstrom composite ab.

Lucernavägen 9 593 50 Västervik | Sweden Tel: +46 (0)490 89580 Fax: +46 (0)490 35302 E-post: [email protected]

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• Tech | Press

WATCH LIVE: First all-civilian spacewalk begins

Moscow concert attack: More than 60 reported dead; ISIS claims responsibility

This live blog has ended. For the most recent updates, please click here .

What we know about the Moscow concert attack

• Men in camouflage broke into a Moscow concert hall and opened fire, shooting an unknown number of people, Russia’s prosecutor general said.
• The terror group ISIS has claimed responsibility but did not provide proof of the claim, which was made on ISIS-affiliated news agency Amaq on Telegram.
• Russia's Investigative Committee said that more than 60 people are dead after the attack at Crocus City Hall. Officials have said more than 100 others were injured.
• A fire also started inside Crocus City Hall, a large concert venue northwest of central Moscow. Firefighters have evacuated about 100 people from the basement of the building and efforts are underway to rescue people from the roof, Russian emergency officials said.
• Russia officials said they were investigating the attack as a terrorist act.
• A popular rock band was scheduled to play what appeared to be a sold-out show at the venue, which has a maximum capacity of more than 9,000 people.

Three children among those killed, state media reports

Chantal Da Silva

Three children were among the more than 60 people killed in yesterday's attack at Crocus City Hall, Russian news agency RIA Novosti reported, citing the Russian Ministry of Health.

Officials have warned that the death toll connected to the deadly incident may increase as the investigation continues.

Xi sends condolences to Putin

Chinese President Xi Jinping sent condolences to Russian President Vladimir Putin on Saturday after a deadly shooting at a concert hall near Moscow, saying China opposes all forms of terrorism and strongly condemns terrorist attacks.

China firmly supports the Russian government’s efforts to maintain national security and stability, Xi said, according to CCTV state television. 

Moscow bloodshed comes two decades after some of worst attacks in Russia

Phil Helsel

The shooting attacks in Moscow are the latest in a series of deadly terror attacks in the country since the 2000s.

In 2004, militants from Chechnya and elsewhere took hostages at a school in Beslan in southern Russia.

The militants demanded a withdrawal from Chechnya. Hostages were kept in a gymnasium, and 334 died — half of them children — when gunfire and explosions erupted when it was stormed. Hostages’ families were critical of the rescue operation. Russian prosecutors later cleared authorities .

Two years prior, in 2002, Chechen separatists attacked the Dubrovka Theater in Moscow and took more than 700 people hostage. Russian forces used gas, and 129 hostages died. The attackers were killed.

More recently, in 2017 a suicide bomber from Kyrgyzstan killed 15 people as well as himself in an attack on a St. Petersburg subway. In 2013, two bombers killed a combined 34 people in attacks on a railway station and a trolleybus in Volgograd.

The group Islamic State, also known as ISIS, claimed responsibility for the attacks Friday at the Crocus City Hall venue.

Putin wishes victims well, deputy prime minister says

President Vladimir Putin is thinking of those injured in today’s attack and thanked doctors, a Russian government official said according to state media.

State media TASS reported that “Putin wished all those injured in the emergency at Crocus City Hall to recover and conveyed his gratitude to the doctors, Golikova said,” referring to Tatiana Golikova deputy prime minister for social policy, labor, health and pension provision.

More than 60 dead, and death toll could grow, Russian agency says

Russia’s Investigative Committee said Saturday that more than 60 people have died in the attack, and warned the number may increase.

“The bodies of the dead are being examined. It has been previously established that more than 60 people died as a result of the terrorist attack. Unfortunately, the number of victims may increase,” according to the Investigative Committee, which is a federal state agency.

Russia's Ministry of Internal Affairs and the security agency FSB are continuing to investigate, the committee said in a statement, and weapons and ammunition have been found.

U.S. warned Russia about planned terrorist attack in Moscow, NSC says

Monica Alba

The United States shared information about a potential terrorist attack in Moscow with Russia’s government earlier this month, a spokesperson for the National Security Council said.

The U.S. Embassy in Russia on March 7 warned U.S. citizens to avoid crowds and said it was monitoring reports that extremists might attack large gatherings in Moscow.

“Earlier this month, the U.S. Government had information about a planned terrorist attack in Moscow — potentially targeting large gatherings, to include concerts — which prompted the State Department to issue a public advisory to Americans in Russia,” NSC spokesperson Adrienne Watson said.

“The U.S. Government also shared this information with Russian authorities in accordance with its longstanding ‘duty to warn’ policy,” Watson said.

Putin recently dismissed ‘provocative’ warning about potential attacks

In remarks that aired three days ago, Russian President Vladimir Putin accused the West of “provocative statements” about potential terror attacks in Russia, and dismissed them.

“I’ll remind you of recent, let’s say directly, provocative statements of certain official Western structures about potential terror attacks in Russia,” Putin said.

“All of this looks like obvious blackmail and an attempt to intimidate, destabilize our country,” he said before the state security agency FSB.

Putin in those remarks did not specify a country or warning. The U.S. embassy in Russia on March 7 warned U.S. citizens to avoid crowds .

“The Embassy is monitoring reports that extremists have imminent plans to target large gatherings in Moscow, to include concerts, and U.S. citizens should be advised to avoid large gatherings over the next 48 hours,” the U.S. embassy warned.

Guards at concert hall didn't have guns, state news says

The Associated Press

Guards at the concert hall didn’t have guns, and some could have been killed at the start of the attack, Russian media reported.

Some Russian news outlets suggested the assailants fled before special forces and riot police arrived.

Reports said police patrols were looking for several vehicles the attackers could have used to escape.

U.S. had been gathering intelligence that ISIS could attack Russia

Ken Dilanian

The U.S. had been gathering intelligence for months that ISIS could mount a mass casualty attack in Russia, two U.S. officials confirmed to NBC News.

That information led to a March 7 warning issued by the U.S. embassy in Russia about possible extremist attacks, including at concerts, urging people to stay away from large gatherings, one of the officials said.

That official said the claim of responsibility today by ISIS appears to be genuine, though no final assessment had been made about who was responsible.

Some Moscow concertgoers filmed events as they unfolded Friday night, when gunmen opened fire inside a theater and people ran to take cover in fear for their lives.

Witness says gunfire was first thought to be construction noise

A witness to today’s armed attack on Moscow’s Crocus City Hall told a state news agency that they first mistook the gunfire for sounds of an installation being dismantled.

“First, we started hearing typical loud pops, but it was impossible to understand that they were gunshots. We thought that something was falling, as exhibitions were being dismantled at that moment, and someone seemed to be dropping something large,” Mikhail Semyonov told TASS .

“Then, the bangs were getting more and more frequent. Suddenly, there was a scream, and the bangs started to be heard as bursts. Then it became clear that it was shooting,” he said.

ISIS claims responsibility for attack but does not provide proof

The terror group Islamic State has claimed responsibility for the attack in Moscow.

The group, also known as ISIS, did not provide any proof of its claim, which came from ISIS-affiliated news agency Amaq on Telegram.

The group’s members have carried out a number of terror attacks, including the 2015 attacks in Paris that killed 130 people.

Children among the victims, Russia's children commissioner says

Yuliya Talmazan

Russia’s commissioner for children’s rights, Maria Lvova-Belova, said children were among the victims of tonight's attack.

"Information about their condition is regularly updated," Lvova-Belova said on Telegram. "Any additional assistance will be provided immediately."

She later told Russia 24 TV channel that at least two children had been injured, including one boy with a gunshot wound.

Earlier, Russian officials released a preliminary casualty toll of at least 40 people dead and more than 100 injured.

France, U.K., Germany condemn attack

Officials from France, the U.K. and Germany were among those who expressed their condolences to the victims of the attack at the Crocus concert hall.

"The images of the terrible attack on innocent people in Crocus City Hall near #Moscow are horrific," Germany's Foreign Office said on X . "The background must be investigated quickly. Our deepest condolences with the families of the victims."

"We condemn the terrorist attack in the Crocus City Hall near Moscow," the U.K.'s embassy in Russia said . "This is a terrible tragedy."

Meanwhile, France's foreign ministry called for "full light" to be shed on "these heinous acts."

Public events across Russia called off after attack

Several regional leaders across Russia, including in the annexed Kherson region of Ukraine, have canceled public events this weekend over security considerations after the deadly concert attack in Moscow.

Shortly after the attack, Moscow Mayor Sergey Sobyanin canceled all sports, cultural and other public events in Moscow this weekend. State news agency TASS also quoted Russia's cultural ministry as saying that mass and entertainment events in federal cultural institutions have been canceled in the coming days.

Zelenskyy adviser speaks out about attack

President Volodymyr Zelenskyy’s adviser denied that Ukraine was involved in the deadly Crocus concert hall attack.

“Ukraine certainly has nothing to do with the shooting/explosions in the Crocus City Hall (Moscow Region, Russia),” Mykhailo Podolyak wrote on X. “It makes no sense whatsoever.”

No evidence has emerged to suggest Ukraine may have been involved, but Ukrainian officials may be trying to pre-empt accusations, as some Kremlin hawks have already started pointing at Kyiv. 

Asked whether the shooting was at all tied to the war in Ukraine, U.S. National Security Council spokesperson John Kirby said: “There is no indication at this time that Ukraine, or Ukrainians, were involved in the shooting, but again, this just broke. We’re taking a look at it, but I would disabuse you at this early hour have any connection to Ukraine.”

Videos posted to social media appear to show chaos inside Moscow's Crocus City Hall during and after a terrorist attack.

Some videos include what sound like gunshots and show men with rifles, as concertgoers frantically try to exit the venue.

State Department issues warning to Americans in Moscow

Jason Abbruzzese

The State Department said that the U.S. Embassy in Moscow is aware of the terrorist attack on Crocus City Hall and that U.S. citizens should avoid the area and follow the instructions of local authorities.

"The U.S. government’s ability to provide routine or emergency services to U.S. citizens in Russia is severely limited, particularly in areas far from the U.S. embassy in Moscow, due to Russian government limitations on travel for U.S. embassy personnel and staffing, and the ongoing suspension of operations, including consular services, at U.S. consulates in Russia," the State Department said in a message posted to its website .

'What a nightmare in Crocus,' Widow of opposition leader Alexei Navalny condolences about concert attack

Yulia Navalnaya, the widow of Russian opposition leader Alexei Navalny who died in prison last month, expressed her condolences about the attack Friday.

"What a nightmare in Crocus," Navalnaya wrote on X. "Condolences to the families of the victims and quick recovery to the injured. Everyone involved in this crime must be found and held accountable."

320 firefighters, 3 helicopters working to put out fire

Russia's Ministry of Emergency Situations said the number of rescue crews responding to the attack is growing and now includes more than 320 firefighters, 130 emergency vehicles and three helicopters dumping water on the burning concert venue.

Moscow regional governor says 40 dead, more than 100 injured

Moscow Regional Governor Andrei Vorobyov said on Telegram that at least 40 people are dead and more than 100 injured in the terrorist attack, confirming figures previously reported by Russian state news.

Putin informed about concert venue attack 'in the first minutes,' Kremlin spokesperson says

Kremlin spokesperson Dmitry Peskov said President Vladimir Putin was informed about the shooting at the Crocus concert hall "in the first minutes" of the attack, Russian state news agency RIA reported.

The president is receiving information about what is happening and the measures being taken through all relevant services and is giving necessary instructions, Peskov said according to RIA.

Russian journalist was inside concert venue when gunmen entered

Russian news agency RIA Novosti said on Telegram that one of its reporters was inside the venue when gunmen entered and began shooting concertgoers.

The journalist said that at least three unmasked gunmen in camouflage entered the hall a few minutes before 8 p.m. Moscow time. They shot people point-blank and threw incendiary bombs, according to the journalist.

Russia's foreign ministry spokesperson calls incident 'bloody terrorist attack'

Maria Zakharova, spokesperson for Russia's foreign ministry, called the Friday night incident at the Crocus City Hall in Moscow a "bloody terrorist attack" as she called for "strong condemnation" from the international community.

"Now, as the Russian authorities have stated, all efforts are being devoted to saving people," Zakharova said. "The entire world community is obliged to condemn this monstrous crime!"

U.S. national security spokesperson says embassy has told Americans to avoid large gatherings in Moscow

Kyla Guilfoil

National Security Council Spokesman John Kirby addressed the attack in Moscow at a White House press briefing Friday afternoon, calling it a “terrible, terrible shooting attack.”

“The images are just horrible and just hard to watch and our thoughts obviously are going to be with the the victims,” Kirby said.

Kirby added that the U.S. embassy has notified all Americans in Moscow to avoid large gatherings, concerts, shopping malls, etc., and “stay put where they are” for their safety.

Russian media says 40 dead, more than 100 injured at concert attack

TASS, Russia's state-owned news agency, and RIA Novosti are reporting that Russia's FSB security agency has put the preliminary casualty count at 40 dead and more than 100 injured by a terrorist attack on a Moscow-area concert venue.

NBC News has not confirmed those casualty numbers.

Roof of concert venue at risk of collapse, Russian media says

Russian news agency RIA Novosti said on Telegram that the roof of the building near the concert venue's stage has begun to collapse.

Video posted to Telegram by RIA Novosti showed fire continue to blaze inside the venue.

Moscow area governor says more than 70 ambluances at scene of attack

Andrei Vorobyov, Moscow's regional governor, said on Telegram that more than 70 ambulances have been dispatched to the scene of concert venue attack.

“Everything is being done at the scene to save people," he wrote in the Telegram message. "The Special Rapid Response Unit (SOBR) has been deployed. There are over 70 ambulance carriages near Crocus, doctors provide the necessary assistance to all victims."

Nigel Chiwaya

Russia’s prosecutor general office says number of victims still being determined

Russia's prosecutor general said on Telegram that officials are working to determine how many people have been killed or hurt in the concert attack.

“On behalf of Igor Krasnov, the prosecutor of the Moscow region has gone to the scene of the incident at Crocus City Hall to coordinate the actions of law enforcement agencies," the prosecutor general's Telegram account posted. "Tonight, before the start of the event in the concert hall in Krasnogorsk, unknown men in camouflage clothes broke into the building and started shooting."

"The number of victims is being determined, a fire started in the entertainment center building, and citizens are being evacuated."

Moscow's mayor cancels weekend events

Moscow Mayor Sergei Sobyanin said on Telegram that he was canceling all public events in Moscow this weekend.

"I have taken the decision to cancel all sports, cultural and other public events in Moscow this weekend," he said. "I ask of you to treat this measure with understanding."

Popular rock band was to play sold-out venue that can hold 9,500

Tim Stelloh

A popular rock band was scheduled to play what appeared to be a sold-out show at the Moscow concert hall where there were reports of gunmen in combat fatigues opening fire.

Picnic, formed in 1978, was to play at Crocus City Hall, west of central Moscow.

The multilevel facility in Krasnogorsk has a maximum capacity of 9,527 people. Booking sites show the event was sold out.

Russia's aviation agency says additional security added to Moscow airports

The Russian aviation agency Rosaviatsiya said that additional security measures are being introduced in Moscow airports

"Due to increased security measures, we ask passengers to arrive at Sheremetyevo, Domodedovo, Vnukovo and Zhukovsky airports in advance," the agency said on the Telegram messaging app.

Moscow's emergency ministry says it is working to extinguish fire

Moscow’s emegency ministry said it was working to extinguish a fire that began at the music venue.

The ministry said about 100 people were evacuated from the building, and it was working to rescue people from the roof.

Russian media says state security taking action

Russia's news outlet RIA Novosti said that the country's security agency, the FSB, is taking measures to respond to the shooting at a concert hall near Moscow.

Videos posted by Russian media show men with rifles moving through area

Extended rounds of gunfire could be heard on multiple videos posted by Russian media and Telegram channels. One showed two men with rifles moving through a concert hall. Another one showed a man inside the auditorium, saying the assailants set it on fire, with incessant gunshots ringing out in the background.

Andrei Vorobyov, the governor of the Moscow region, said he was heading to the area and set up a task force to deal with the damage. He didn’t immediately offer any further details.

Russian media reports said that riot police units were being sent to the area as people were being evacuated.

Russian news outlets report gunman opened fire at Moscow concert hall

Several gunmen in combat fatigues burst into a big concert hall in Moscow on Friday and fired automatic weapons at the crowd, injuring an unspecified number of people, Russian media said.

Russian news reports said that the assailants also used explosives, causing a massive blaze at the Crocus City Hall on the western edge of Moscow. Video posted on social media showed huge plumes of black smoke rising over the building.

Russia’s state RIA Novosti news agency reported that at least three people in combat fatigues fired weapons. The state Tass news agency also reported the shooting.

U.S. warned of imminent Moscow attack by ‘extremists,’ urges citizens to avoid crowds

Patrick Smith Patrick Smith is a London-based editor and reporter for NBC News Digital.

U.S. citizens in  Moscow  had been warned to avoid large gatherings earlier this month because of heightened fears of a terrorist attack.

The U.S. Embassy in the Russian capital said it was “monitoring reports that extremists have imminent plans to target large gatherings in Moscow, to include concerts, and U.S. citizens should be advised to avoid large gatherings over the next 48 hours.”

U.S. citizens should avoid crowds, monitor local media for updates and “be aware of your surroundings,” it said in a brief  online update .

Read the full story here.