oyster 45 sailboat data

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• Oyster 45 Sailboat

The Oyster 45 Sailboat Specs & Key Performance Indicators

The Oyster 45 sailboat, designed by British naval architect Rob Humphreys, is a notable model from the prestigious Oyster range, known for its sturdy construction and capability in various sailing conditions. The vessel is built by Oyster Yachts, a company founded in 1973 and based in Southampton, England.

Published Specifications for the Oyster 45 Sailboat

Underwater Configuration: Fin keel & Spade Rudder Hull Material: Fiberglass Length Overall: 45 feet (13.72 meters) Waterline Length: 38 feet (11.58 meters) Beam: 14 feet (4.27 meters) Draft: 6.25 feet (1.90 meters) Rig Type: Sloop Displacement: 29,762 pounds (13,500 kilograms) Designer: Holman & Pye Builder: Oyster Marine Year First Built: 1996 Year Last Built: 2002 Number Built: Approximately 36

Published Design Ratios for the Oyster 45 Sailboat

• Sail Area/Displacement Ratio (13.3): This ratio suggests that the Oyster 45 is somewhat underpowered with its sail area to displacement ratio falling below 16. This indicates that while the sailboat might not exhibit high performance suited to racing, it should perform adequately for cruising purposes. The sailboat will have enough sail area to handle most conditions comfortably but might struggle with speed in very light winds.
• Ballast/Displacement Ratio (33.1): With a ratio above 33 but below 40, the Oyster 45 offers a moderate level of stiffness and should be able to stand up reasonably well to the wind. It isn't as stiff as boats with a ratio of 40 or more, which might affect performance in very heavy winds or when heavily heeled. This ratio also doesn't account for the distribution of ballast; if much of the ballast is lower in the keel, the boat could be stiffer than another with the same ratio but less optimally placed ballast. *  
• Displacement/Length Ratio (284.8): Falling within the 'Heavy Displacement' range, the Oyster 45 is built to endure rather than to excel in speed. The heavy displacement suggests better seaworthiness and durability, as well as the ability to carry more provisions and equipment for long passages. This would typically translate into a slower acceleration and greater momentum, which can be advantageous in rough seas but a disadvantage in races or when nimble maneuvers are required.
• Comfort Ratio (40.4): This effectively places the Oyster 45 as a moderate bluewater cruising boat, leaning towards heavy bluewater characteristics. The higher comfort ratio implies that the boat will have less pronounced pitch and roll motions, which is desirable for comfort during long passages. This is particularly beneficial for cruisers looking for a boat that provides stability and less motion sickness in adverse conditions.
• Capsize Screening Formula (1.72): A result well below the threshold of 2.0 signals that the Oyster 45 has good inherent stability and is suitable for ocean passages. This lower capsize ratio implies that the boat is less likely to capsize in heavy weather, providing an extra measure of safety that will be appreciated in challenging conditions.

But note these limitations:

• The theoretical limitations of the Ballast/Displacement Ratio should be noted as it does not provide information on how the ballast is distributed within the hull, an important factor in the overall stability and performance of the sailboat.
• Additionally, the Comfort Ratio, favouring heavier and traditionally shaped boats, might not accurately reflect the comfort experienced on more contemporary yacht designs known for their light displacement and broader beams. Thus, while the Oyster 45 scores well on Ted Brewer’s comfort ratio, it doesn’t mean that newer designs are necessarily uncomfortable; the metric simply favours older, heavier designs.

Read more about Design Ratios...

The Oyster 45 was conceived as a replacement to the extremely successful 435. Holman and Pye increased the hull volume to enable the 45 to offer three genuine cabins and a class-leading saloon that extends over the full beam of the boat.

* The 45 also offers improved sailing performance, the move to an external bulb keel making her stiff and responsive.

In summary, the Oyster 45 is ideally configured for long-duration cruising with moderate to heavy sailing conditions based on its design ratios. It combines seaworthiness with reasonable performance and good onboard comfort, making it suitable for cruisers who value safety and comfort over speed.

The above text was drafted by sailboat-cruising.com using GPT-4 (OpenAI’s large-scale language-generation model) as a research assistant to develop source material; we believe it to be accurate to the best of our knowledge.

Press Reviews for the Oyster 45 Sailboat

Cruising World tells us: "Noteworthy attributes include a graceful high-aspect sailplan, a center cockpit, and Oyster’s signature “Deck Saloon” cabin configuration. The deckhouse is raised in a subtle fashion, preserving aesthetically the boat’s low profile while enabling the interior to become open, airy and vast. Fixed wraparound windows of stout 9mm tinted glass admit plenty of ambient light and add to the sensation of volume and space. It all comes together in the saloon, a remarkable area as cheerful as it is elegant." Read more...

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Review of Oyster 45

Basic specs..

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 Oyster 45 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 only enter major marinas as the draft is about 1.98 - 2.08 meter (6.50 - 6.80 ft) dependent on the load.

Sailing characteristics

This 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.

Sorry, we have no sailing characteristics available for this boat.

Sailing statistics

This 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 a Ballast Ratio?

Maintenance

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.

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

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• Sailboat Guide

Oyster 45 is a 44 ′ 3 ″ / 13.5 m monohull sailboat designed by Holman & Pye and built by Oyster Marine starting in 1996.

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)

Draft (opt. shoal): 5.42’/1.65m

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Oyster 45 – GIGI OF BEAULIEU – afloat and on video at Berthon

September 20th, 2019

Available to see, touch and write a cheque for at Berthon HQ. Oyster 45, GIGI OF BEAULIEU is a pocket bluewater yacht with lots of potential that already has an Atlantic circuit beneath her keel.

Watch the movie here –

From 2004, to designs by Holman & Pye – her interior is enormous. So much she thinks that she’s a 50 footer…

With lovely oak veneers and a chequerboard sole, she is bright and airy and comes with a fantastic owners’ cabin and two good guest cabins.

Totally reworked in this ownership including – new copper bottom, rebuild of rig and new standing rigging, new sails, watermaker overhaul, engine deep service and new membrane, total rework of electricals and plumbing, new upholstery and safety gear – the list goes on and on.

With her practical furling rig and deep safe cockpit she is perfect for 2-handed sailing, and her modest size makes her welcome in local ports for coastal cruising too.

Very well sorted cruising yacht with lots of potential, whose owner’s change of plan means that her new owner will have all the fun with her.

For all the griff about GIGI visit –

[OFF MARKET]

Our offices are open 7 days a week, so please do make an appointment to view.

Contact [email protected] .

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Sailboat Review: Oyster 495 Combines Performance and Power In Under 50 Feet

• By Kimball Livingston
• October 27, 2023

Few boats would merit a glance from a savvy, experienced skipper looking to consolidate the best qualities of his performance cruiser and his motoryacht into just one boat.

Someone might even ask: “Are you kidding me? Can you do that?”

Enter the Oyster 495.

As the smallest yacht the company has developed from concept since 2005, the 495 is rigorously detailed. It is true to the heritage of a builder where a 50-footer has become the entry-level model. 

For this latest raised-salon offering, Oyster created a new facility in Hythe, on the Southampton shores of southern England. The aim is to build 12 boats a year, and sales to date suggest that this figure is not overly ambitious. 

I encountered Genevieve , the well-traveled Hull No. 1, in Southern California, where the boat had been delivered to the owner in Santa Barbara after being shown extensively in Europe. She was purchased to replace a performance cruiser and a powerboat. 

First impressions count, and the 495 makes a great one. If you’re switching over from a different brand, forget about bringing along your plates and glassware. All of that is provided, with subtle logos and fitted stowage. Mood lighting is available at the touch of a button. The TV raises and disappears with another button. In the guest stateroom forward, hatches overhead open in opposite directions. The queen berth in the owner’s stateroom could be a boat-show sales tool, but the cabin top is equipped for the lee cloths you will need when the boat is doing what it is meant to do: go places. 

To that end, an aluminum mast with electric furling is standard, but Genevieve is equipped with a Seldén carbon rig with in-mast electric furling and a hydraulics package including a mainsheet, vang, outhaul, backstay, and ­in-boom ram. In operation, it was whisper-quiet. 

The twin wheels offer clear sightlines from secure footing, along with command posts that have buttons to deploy and furl sails, and to adjust everything adjustable without straining a finger or risking a hangnail. Lewmar EVO primaries are handy, just outboard of the helm stations. Optional dual thrusters make everyone a hero going and coming to the dock, and smaller items such as pre-rigged preventers speak to that shadowy concierge who seems to have been everywhere. 

With four of us aboard, the cockpit was more than ­generous. I imagined many sociable scenes to come as the sails came out. The Yanmar saildrive was so quiet, it had to go off for me to even notice it had been on. Put that down to sandwich insulation glued, not screwed. 

The breeze was single digits, not enough to make the boat light up under a 105 percent jib, and we were dragging a wide transom and two rudders. Nevertheless, it was enjoyable sailing. I also appreciated seeing the cabin house square to the seating, to make a comfortable backrest looking aft, stretched out on passage. Rounding the forward backing the way some manufacturers do may work when you’re not going anywhere, but what is a boat for? 

The cockpit is laid out to walk on a single level back to a full-beam lazarette, which has ample stowage and access to the steering, backstay, exhaust and seacocks. Step back farther, and you are stepping down a reverse transom to a shower and an electronically operated swim platform. When the boat is stern-tied, that will be the boarding ladder. 

Belowdecks is bright, with close attention to ­ventilation. The opening coachroof windows in the salon will delight passengers in a tropical anchorage with the breeze wafting through. Batteries and tankage are centered under the salon sole, focusing the weight where it belongs. A U-shaped galley, two steps down to port, places most of the cook’s needs at hand in a space where it will be easy to brace underway, and the cook is not isolated from crew and guests. The twin sinks are on centerline for efficient drainage. 

The saloon table lowers to bed height for those who are overblessed with kids or grandkids, and the step-down nav station is separated but not isolated. A swing-out computer screen is here, along with CZone control and monitoring instead of fuse panels. A freezer is abaft the nav station, where it won’t see a lot of traffic unless it’s stocked with ice cream for those kids. 

Opposite the nav station, twin doors open wide to an engine compartment thoughtfully laid out to be serviced without provoking naughty words. Clear labeling matters, and I liked seeing the Panda generator within a sound-­insulated compartment.  

All the way aft, the owner’s stateroom has 6 feet, 4 inches of headroom, a sofa, cedar-lined lockers, escape hatches, and Oyster’s signature vertical portlights for a special view of the world. Forward of the salon is a cozy over/under double that shares a head and shower with the bright and airy forward stateroom. Nowhere above or belowdecks does the level of fit-and-finish fall short. 

Oyster describes the hull as an “overspecified laminate resin structure with a combination of stringers and frames for extreme strength and durability.” I believe it. Genevieve had the L-shaped standard keel and a draft of 7 feet, 5 inches. A shoal-draft keel is an option. 

Lunch waited ashore, ­creating an opportunity to ­observe how magically the sails disappeared and how comfortably the boat motored at 9-plus knots. It’s replacing a powerboat, remember. There was also a moment to ­demonstrate that, under power, the Oyster 495 will spin in its own length. That gave me a grin too.

Oyster 495 Specifications

• More: Oyster Yachts , Print September 2023 , Sailboat Reviews , Sailboats
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WHAT WE SAY

Broker's comments, oyster brokerage are delighted to announce the listing of oyster 675-04 seabird..

The Oyster 675 is a beautifully proportioned 70 foot sailboat with a huge hull volume that makes her extremely versatile. Well provisioned as an ocean sailboat, with large tankage, ample space above and below decks and plenty of stowage, including a vast, full-width lazarette. The spacious and sheltered cockpit, with space for eight features audio and a built-in refrigerator.

The Oyster 675 is a joy to sail shorthanded or with a crew. Her powerful 70 foot twin rudder hull form makes sailing a pure pleasure. Despite her substantial displacement, the Oyster 675 is responsive and fast-moving, delivering consistently fast passage-making speed. Our design team have gone to extreme lengths to consider every aspect of the sailing experience to make her equally suited to shorthanded sailing or cruising with a full crew. When manoeuvring in tight spots, the retractable bow and stern thrusters, fitted as standard, provide complete control.

The ergonomically designed twin helm stations feature large helm seats with backrests, grab handles and sunken footwells for protection if conditions turn rough. She features a hydraulic push-button, in-mast furling and headsail furling is set up as standard. All navigation and automated sailing controls are located on the twin helm stations, with winches positioned within easy reach.

The Oyster 675 is a true bluewater adventure machine, designed and built to our meticulous and renowned build quality.

Contact us now to find out more and to schedule a viewing.

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