Posting Rules | post new threads post replies post attachments edit your posts is are code is are are are | Privacy Guaranteed - your email is never shared with anyone, opt out any time. COLUMBIA 28 Detailed ReviewIf you are a boat enthusiast looking to get more information on specs, built, make, etc. of different boats, then here is a complete review of COLUMBIA 28. Built by Columbia Yachts and designed by William Crealock, the boat was first built in 1967. It has a hull type of Fin w/spade rudder and LOA is 8.41. Its sail area/displacement ratio 15.81. Its auxiliary power tank, manufactured by Universal, runs on Gas. COLUMBIA 28 has retained its value as a result of superior building, a solid reputation, and a devoted owner base. Read on to find out more about COLUMBIA 28 and decide if it is a fit for your boating needs. Boat InformationBoat specifications, sail boat calculation, rig and sail specs, auxillary power tank, accomodations, contributions, who designed the columbia 28. COLUMBIA 28 was designed by William Crealock. Who builds COLUMBIA 28?COLUMBIA 28 is built by Columbia Yachts. When was COLUMBIA 28 first built?COLUMBIA 28 was first built in 1967. How long is COLUMBIA 28?COLUMBIA 28 is 6.61 m in length. What is mast height on COLUMBIA 28?COLUMBIA 28 has a mast height of 8.15 m. Member Boats at HarborMoorColumbia 28 2The columbia 28 2 is a 27.58ft masthead sloop designed by william crealock and built in fiberglass by columbia yachts since 1969.. The Columbia 28 2 is a moderate weight sailboat which is a reasonably good performer. It is very stable / stiff and has a good righting capability if capsized. It is best suited as a coastal cruiser. The fuel capacity is originally very small. There is a very short water supply range. Columbia 28 2 for sale elsewhere on the web:Main features Model | Columbia 28 2 | | | Length | 27.58 ft | | | Beam | 8.50 ft | | | Draft | 4.80 ft | | | Country | United states (North America) | | | Estimated price | $ 0 | | ?? | Login or register to personnalize this screen. You will be able to pin external links of your choice. See how Sailboatlab works in video Sail area / displ. | 16.01 | | | Ballast / displ. | 44.12 % | | | Displ. / length | 291.81 | | | Comfort ratio | 25.79 | | | Capsize | 1.80 | | | Hull type | Monohull fin keel with spade rudder | | | Construction | Fiberglass | | | Waterline length | 21.83 ft | | | Maximum draft | 4.80 ft | | | Displacement | 6800 lbs | | | Ballast | 3000 lbs | | | Hull speed | 6.26 knots | | | We help you build your own hydraulic steering system - Lecomble & Schmitt Rigging | Masthead Sloop | | | Sail area (100%) | 358 sq.ft | | | Air draft | 0 ft | | ?? | Sail area fore | 204 sq.ft | | | Sail area main | 154.82 sq.ft | | | I | 34 ft | | | J | 12 ft | | | P | 27.33 ft | | | E | 11.33 ft | | | Nb engines | 1 | | | Total power | 0 HP | | | Fuel capacity | 12 gals | | | Accommodations Water capacity | 18 gals | | | Headroom | 0 ft | | | Nb of cabins | 0 | | | Nb of berths | 0 | | | Nb heads | 0 | | | Builder data Builder | Columbia Yachts | | | Designer | William Crealock | | | First built | 1969 | | | Last built | 0 | | ?? | Number built | 0 | | ?? | Modal TitleThe content of your modal. Personalize your sailboat data sheet Paste a link here: Give it a title: And eventually a link to an image for the thumbnail: × You are using an outdated browser. Please upgrade your browser to improve your experience. We Ship Worldwide! | FREE SHIPPING! for US Continental orders over $99. Click for details. Shopping CartYour cart is currently empty.. FREE SHIPPING! for US Continental orders over $99 click for details Columbia 28 - Sailboat Data, Parts & RiggingSailboat data, rig dimensions and recommended sail areas for Columbia 28 sailboat. Tech info about rigging, halyards, sheets, mainsail covers and more. Sailboat Data directory for over 8,000 sailboat designs and manufacturers. Direct access to halyards lengths, recommended sail areas, mainsail cover styles, standing rigging fittings, and lots more for all cruising and racing sailboats. MAURIPRO Sailing offers a full range of sailboat and sailing information to help you find the correct sailboat part, one that properly would fit your sailboat and sailing style. Our sailor's and sailboat owner support team are ready to talk with you about your specific sailing needs, coming regatta, or next sailing adventure. From all at MAURIPRO, let's Go Sailing! Copyright © 2024 MAURIPRO Sailing LLC.A password will be e-mailed to you Reset PasswordCOLUMBIA 28-2More information, image gallery, floor plans. Use the form below to contact us! - Choose the kind of boat Big boats Motor boats Rubber boats Sailing boats Sailing multihull boats
Columbia Yachts Columbia 28General DataShipbuilder:, see also: boats for sale. - Gibert Marine GIB'SEA 84
- CNSO (Francia) Super Daimio
- Barberis Show 27
- Dufour 2800
Overall length:Waterline length:, maximum beam:, straightening:, sail details mq. Great choice! Your favorites are temporarily saved for this session. Sign in to save them permanently, access them on any device, and receive relevant alerts. Columbia 28-2Columbia 28-2 is a 27 ′ 7 ″ / 8.4 m monohull sailboat designed by William Crealock and built by Columbia Yachts starting in 1969. Rig and SailsAuxilary 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 RatioA 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 RatioA 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 RatioA 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 RatioThis 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 FormulaThis 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) Besides a slightly different keel and sail plan than the earlier COLUMBIA 28, they are nearly the same. Also similar to CORONADO 28. Later available in ‘kit’ form as the SAILCRAFTER 28. Embed this page on your own website by copying and pasting this code. Discover Related SailboatsColumbia 28©2024 Sea Time Tech, LLC This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. - Forums New posts Unanswered threads Register Top Posts Email
- What's new New posts New Posts (legacy) Latest activity New media
- Media New media New comments
- Boat Info Downloads Weekly Quiz Topic FAQ 10000boatnames.com
- Classifieds Sell Your Boat Used Gear for Sale
- Parts General Marine Parts Hunter Beneteau Catalina MacGregor Oday
- Help Terms of Use Monday Mail Subscribe Monday Mail Unsubscribe
Any Info on this Columbia 28?- Thread starter Cap'n Dave
- Start date Jan 10, 2006
- Brand-Specific Forums
I am looking at what is being represented as a 1978 Columbia 28. However, I have been unable to find any info anywhere online about this particular model. Even the Columbia website showing all of the models didn't show this one. Can anyone take a look at the photo and tell me about the boat? Thanks! Check the HIN and google "hull identification numbers." It will tell you everything you need to know about the boat and her parents. Larry WilsonEric White may know..... The entire Columbia Yacht Owners Association list has been trying to figure out what that boat is...so far no luck. The Serial number doesn't match anything I've ever seen ....Eric White may know..he's pretty much the expert. contact him here....Eric White ([email protected]) Stephen ScottThat boat is junk! Rin away fast! That boat is complete junk. Very dangerous. Do not get involved with it in any way. Give me theexact location and the owners name and I will go deal with it personally.stephen Casual ReaderJunk quote questioned, what gives? Question I have is how and why this poster (Stephen Scott) would say this? He claims, by giving none of the facts which give rise to his opinion, to be an expert, but why would I or anyone agree that he is? The boat photo looks suspiciously like the photo of a Columbia 25 that I saw posted on ebay.What gives? Does anyone else agree with or believe Stephen, or disagree with him, based on the photo only? Or was the posting just a joke, (not funny) where Stephen was just taking a jab at the original poster seeking information? columbia 28 AS THE OWNER OF A COLUMBIA 28, THE FOTO YOU SHOW IS NOT ONE, I HAVE NO IDEA WHAT SHE IS BUT SHE IS NOT A COLUMBIA 28.GOOD LUCK AND HAPPY SAILING. - This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. By continuing to use this site, you are consenting to our use of cookies. Accept Learn more…
Review of Columbia 28Basic specs.. The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all. The boat equipped with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment. The Columbia 28 has been built with different keel alternatives. Unknown keel type The boat can enter even shallow marinas as the draft is just about 1.34 - 1.44 meter (4.40 - 4.70 ft) dependent on the load. See immersion rate below. The Columbia 28 is equipped with a fin keel. The fin keel is the most common keel and provides splendid manoeuvrability. The downside is that it has less directional stability than a long keel. The boat can enter even shallow marinas as the draft is just about 1.40 - 1.50 meter (4.59 - 4.89 ft) dependent on the load. See immersion rate below. Columbia 28 is typically equipped with an inboard Universal Atomic 4 gasoline engine at 30 hp (22 kW). Sailing characteristicsThis section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats. What is Theoretical Maximum Hull Speed? The theoretical maximal speed of a displacement boat of this length is 6.4 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed. The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Columbia 28 is about 121 kg/cm, alternatively 681 lbs/inch. Meaning: if you load 121 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 681 lbs cargo on the boat it will sink 1 inch. Sailing statisticsThis section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points. What is L/B (Length Beam Ratio)? MaintenanceWhen buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 21m 2 (226 ft 2 ). Based on this, your favourite maritime shop can tell you the quantity you need. Are your sails worn out? You might find your next sail here: Sails for Sale If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful. Usage | Length | Diameter | Mainsail halyard | 21.7 m | (71.1 feet) | 8 mm | (5/16 inch) | Jib/genoa halyard | 21.7 m | (71.1 feet) | 8 mm | (5/16 inch) | Spinnaker halyard | 21.7 m | (71.1 feet) | 8 mm | (5/16 inch) | Jib sheet | 8.4 m | (27.6 feet) | 10 mm | (3/8 inch) | Genoa sheet | 8.4 m | (27.6 feet) | 10 mm | (3/8 inch) | Mainsheet | 21.0 m | (69.0 feet) | 10 mm | (3/8 inch) | Spinnaker sheet | 18.5 m | (60.7 feet) | 10 mm | (3/8 inch) | Cunningham | 3.5 m | (11.3 feet) | 8 mm | (5/16 inch) | Kickingstrap | 6.9 m | (22.6 feet) | 8 mm | (5/16 inch) | Clew-outhaul | 6.9 m | (22.6 feet) | 8 mm | (5/16 inch) | This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat. Do you have changes/improvements you would like to share? Upload a photo and describe what you have done. We are always looking for new photos. If you can contribute with photos for Columbia 28 it would be a great help. If you have any comments to the review, improvement suggestions, or the like, feel free to contact us . Criticism helps us to improve. - Forum Listing
- Marketplace
- Advanced Search
- About The Boat
- Boat Review Forum
- SailNet is a forum community dedicated to Sailing enthusiasts. Come join the discussion about sailing, modifications, classifieds, troubleshooting, repairs, reviews, maintenance, and more!
Columbia 28I am new to sailing and trying to find a boat that I can work on fixing up with my son so that we can learn to sail. I found a Columbia 28 for sale in my area for $500. It is in the water and does not come with a trailer. It comes with one sail (main) and a diesel engine (it has not been started in awhile owner was not sure if it would run but thought it would). It has a clear title and sound hull. I am going to inspected tomorrow morning and I was hoping I could get an idea what to look for. Any suggestions from Columbia owners would be great. Any suggestions from anyone would be great. – Thanks for your help. It takes a great deal of expertise to properly inspect (survey) a 28 foot sailboat. Have it surveyed by the best surveyor you can find in your area. Even a $500.00 boat needs a proper survey prior to purchase. So do free boats of that size. There are often problems lurking in used boats that can be very expensive to remedy, and you can easily exceed what it might have cost to buy a similar boat in good, sail-away condition. Elbow grease is cheap, but sailboat parts are anything but. Here's a link to a Sailnet contributer's website. Look through his how to articles until you find his "hall of fail". It documents many things he's found that have been done wrong on sailboats, usually by the previous owner, but many times by the manufacturer. Very sobering. http://www.marinehowto.com When I was a catamaran sailor we used to say there is no such thing as a free boat. I think that applies now to the nth degree. I was offered a similar boat, after I totaled winches, sails , boom, standing rigging, running rigging, haul out, inspection, you name it. I spent more money and bought one in better shape. This link will help you inspect the boat and decide if it is worth buying or hiring a survey for it. It's on Sailnet. http://www.sailnet.com/forums/boat-review-purchase-forum/48177-boat-inspection-trip-tips.html My initial thought is that a $500 boat this size means you are just buying the slip, and the boat is headed to the junk yard. Of course I haven't seen it, or even pictures, but my gut is saying you need to budget $20,000 to get this boat back in shape, and it could be much more. 1) non working engine. My guess is $10k for a repower by the time you are all said and done 2) new jib $2k 3) all new running rigging $2k 4) odds and ends 4-5k Unless she passed survey (and that motor works) I would run from this deal. Much like free boats, cheap boats are often times more expensive than expensive ones. Stumble said: 1) non working engine. My guess is $10k for a repower by the time you are all said and done 2) new jib $2k 3) all new running rigging $2k 4) odds and ends 4-5k Click to expand... Captnscrub said: I am new to sailing and trying to find a boat that I can work on fixing up with my son so that we can learn to sail. I found a Columbia 28 for sale in my area for $500. It is in the water and does not come with a trailer. It comes with one sail (main) and a diesel engine (it has not been started in awhile owner was not sure if it would run but thought it would). It has a clear title and sound hull. I am going to inspected tomorrow morning and I was hoping I could get an idea what to look for. Any suggestions from Columbia owners would be great. Any suggestions from anyone would be great. - Thanks for your help. Click to expand... I agree with those that suggest a surveyor and a haul out. The boat could have a badly blistered bottom and to correct that issue could easily cost thousands. 25 years ago, my brother bought a 40' trawler. The bottom had a serious issue that even his surveyor miss-diagnosed. $16,000 to correct the problem. If you are new to sailing, don't start with a piece of junk. Get yourself a smaller trailerable boat that is fully functional and go for it. Smaller boats on trailers are easier to work on, cheaper in the long run, and just as much fun to sail as the big ones. Even on these smaller used boats you will find plenty of little projects to do with your son. But they will be much easier and cheaper to accomplish. Very good advice! :worthless: Thank you all for your comments and advice. I decided not to buy the boat. Although it was very close. I think I am going to take krisscross's advice and buy something smaller and ready to go that my kids and I can learn to sail on. I think we can spend a year or so learning the basics then move up to a little larger boat to explore southwest Florida. Don't buy anything until you at least look at a Catalina 22. Easy to sail can sleep 2 + 2 kids big cockpit. Huge numbers sold so bits are available off the shelf. Easy to resell. A slightly scruffy one will be 2k without a trailer 3k with. At that price should come with sails and working OB. Totally agree...A C-22 would make a great starter boat. C22's are great boats, but I'd also include the C25 in there. Still trailerable, but more comfortable for a small family, especially if you're going to be staying overnight on the boat. Top Contributors this Month | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Beam: 12.33' Draft: 5.83' | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | © 2001-2024 ./) . . ./) . . |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
IMAGES
VIDEO
COMMENTS
A boat with a BN of 1.6 or greater is a boat that will be reefed often in offshore cruising. Derek Harvey, "Multihulls for Cruising and Racing", International Marine, Camden, Maine, 1991, states that a BN of 1 is generally accepted as the dividing line between so-called slow and fast multihulls.
The Columbia 28 is a 27.58ft masthead sloop designed by William Crealock and built in fiberglass by Columbia Yachts since 1967. 553 units have been built. The Columbia 28 is a moderate weight sailboat which is slightly under powered. It is very stable / stiff and has a good righting capability if capsized. It is best suited as a coastal cruiser.
Columbia 28 is a 27′ 7″ / 8.4 m monohull sailboat designed by William Crealock and built by Columbia Yachts starting in 1967. ... 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. Formula. D/L = (D ÷ 2240) ÷ (0.01 x LWL)³ D: Displacement of the boat in pounds. LWL ...
The 28 was the first of the 'new' direction for Columbia. The 28 was a fin keeler with external hull to deck flange. Not a great fan of this type of construction because it leaves that vital joint hanging out in the wind where it can be easily damaged. The rubber strake that they hide the joint with deteriorates with age and seems to be hard to ...
The Columbia 28 Mk II is equipped with a fin keel. The fin keel is the most common keel and provides splendid manoeuvrability. The downside is that it has less directional stability than a long keel. The boat can enter even shallow marinas as the draft is just about 1.46 - 1.56 meter (4.79 - 5.09 ft) dependent on the load.
If you are a boat enthusiast looking to get more information on specs, built, make, etc. of different boats, then here is a complete review of COLUMBIA 28. Built by Columbia Yachts and designed by William Crealock, the boat was first built in 1967. It has a hull type of Fin w/spade rudder and LOA is 8.41. Its sail area/displacement ratio 15.81.
The Columbia 28 2 is a 27.58ft masthead sloop designed by William Crealock and built in fiberglass by Columbia Yachts since 1969. The Columbia 28 2 is a moderate weight sailboat which is a reasonably good performer. It is very stable / stiff and has a good righting capability if capsized. It is best suited as a coastal cruiser.
Sailboat data, rig dimensions and recommended sail areas for Columbia 28 sailboat. Tech info about rigging, halyards, sheets, mainsail covers and more.
The Columbia 28 is equipped with a finn keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a long keel. The boat can enter even shallow marinas as the draft is just about 1.34 - 1.44 meter (4.40 - 4.70 ft) dependent on the load. See immersion rate below.
A boat with a BN of 1.6 or greater is a boat that will be reefed often in offshore cruising. Derek Harvey, "Multihulls for Cruising and Racing", International Marine, Camden, Maine, 1991, states that a BN of 1 is generally accepted as the dividing line between so-called slow and fast multihulls.
Blue Water Surf Value Rank (BWSVR) 4497. Capsize Comfort Value Rank (CCVR)
Columbia 28 of sailing boat from yard Columbia Yachts. 0 , 2155 , 1.34 , 8.41 , Columbia 28 , 907.0 , Sailing boat , 7.01 , Columbia Yachts , columbia-28 , 2.59 ...
Columbia 28-2 is a 27′ 7″ / 8.4 m monohull sailboat designed by William Crealock and built by Columbia Yachts starting in 1969. ... 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. Formula. D/L = (D ÷ 2240) ÷ (0.01 x LWL)³ D: Displacement of the boat in pounds. LWL ...
Jeff_H. 12548 posts · Joined 2000. #2 · Nov 5, 2001. Columbia built a number of different 28 footers. What year is yours? In a general sense, in their day, Columbias were middle of the road boats, far from being the best built boats but also not the worst. Their fiberglass work was generally considered pretty mediocre and many of their ...
The history of Columbia Yachts, one of the earliest, largest, and most successful American builders of production fiberglass sailing yachts, (the company did offer a line of power yachts at one time) in many ways, mirrors that of the industry as a whole, from around 1960, until the late-1980's. PRE-COLUMBIAN ERA: Glas Laminates, (later called Glass Marine Industries) was a small company that ...
Nov 23, 2004. 281. Columbia 8.7 Super wide body Deltaville (Richmond)VA. Jan 10, 2006. #3. Eric White may know..... The entire Columbia Yacht Owners Association list has been trying to figure out what that boat is...so far no luck.
The boat can enter even shallow marinas as the draft is just about 1.34 - 1.44 meter (4.40 - 4.70 ft) dependent on the load. See immersion rate below. Fin keel. The Columbia 28 is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a full keel.
Columbia 28 preowned sailboats for sale by owner. Columbia 28 used sailboats for sale by owner.
The person financing the project apparently lost interest and the tooling ended up in the hands of Glas Laminates, (later Columbia Yachts). It became one of their signature models. A raised deck version was introduced in 1963 called the COLUMBIA 29 DEFENDER. In 1965 there was a styling change with a new more streamlined deck and coach roof.
1460 posts · Joined 2007. #2 · Nov 14, 2014. It takes a great deal of expertise to properly inspect (survey) a 28 foot sailboat. Have it surveyed by the best surveyor you can find in your area. Even a $500.00 boat needs a proper survey prior to purchase. So do free boats of that size.
Columbia preowned sailboats for sale by owner. Columbia used sailboats for sale by owner. Home. Register & Post. View All Sailboats. Search. ... Sailboat Added 28-Mar-2022 More Details: Columbia Sabre: Length: 32' Beam: 6'3' Draft: 6'4' Year: 1966: Type: racer: Hull: fiberglass monohull: Engine:
A boat with a BN of 1.6 or greater is a boat that will be reefed often in offshore cruising. Derek Harvey, "Multihulls for Cruising and Racing", International Marine, Camden, Maine, 1991, states that a BN of 1 is generally accepted as the dividing line between so-called slow and fast multihulls.