BoatsOyster Marine 575

Oyster Marine 575

Masthead Sloop · Fin keel, spade rudder · First built 2010

A Rob Humphreys-designed masthead sloop built for offshore passage-making with a high sail-area-to-displacement ratio

Designed by Rob Humphreys.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/spade Rudder

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

LivelySea-kindly

Her moderate displacement on a narrow beam gives 41 — a heavy, notably soft motion offshore.

Comfort ratio 41
CoastalBluewater

1.70 — just under the 2.0 offshore line; her beam is modest for her weight.

Capsize screening 1.70
LightHeavy

191 — moderately heavy for her waterline, a balanced cruising weight.

Displacement / length 191
EasygoingPowered-up

22.4 — a lot of sail for her weight; powered-up and eager, a real performer.

Sail area / displacement 22.4
TenderStiff

31% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 31%

A capable offshore cruiser with an easy motion when the sea gets up.

  • Heavier than ~91% of boats her size on file
  • Draws more than ~86% of boats her size on file
  • Beamier than ~87% of boats her size on file

Compared with 823 boats of the same type within a quarter of her length.

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Ballast / displacement
30.6%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
22.4
Displacement / length
190.9
Comfort ratio
40.5
Capsize screening
1.70
Hull speed
9.6 kn
Pounds / inch immersion
3022
Hull
Hull type
Fin w/spade rudder
Construction
Fiberglass
Ballast type
Lead
Production
Years built
First built 2010
Designer
Rob Humphreys
Builder
Oyster Marine, Landamores Yacht Builders

Boats like this, on the water

Nobody has filmed this one — but these are close.

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

Jeanneau Yachts 5717.78 mSame hull familyNear-identical lengthA Philippe Briand-designed bluewater cruiser built for comfort and stability on long-distance passages
Oyster Yachts 56518.09 mSame hull family0.2 m longerA Humphreys-designed bluewater cruiser featuring a high-performance fractional rig, dual rudders, and a bulb keel
Hallberg-Rassy 5718.44 mSame hull family0.6 m longerA 18.44-metre flagship featuring a bulb keel and dual rudders for high-speed, stable long-distance cruising
Beneteau 5717.80 mSame hull familyNear-identical lengthA high-performance Farr-designed cruiser featuring a powerful fractional rig and a balanced, stiff hull for fast passage-making
Oyster 5617.47 mSame hull family0.4 m shorterA Rob Humphreys-designed bluewater cutter built for comfort and stability on long-distance passages
Taswell 5617.02 mSame hull family0.9 m shorterA Bill Dixon-designed cutter with a skeg-hung rudder and high comfort ratio, built for stable, long-range passage making

The family

Related models

The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.

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