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Nautor Swan Swan 58vsOyster 565

Swan 58 is 3.3 ft longer than Oyster 565 (6%). Swan 58 is 0.5 ft wider than Oyster 565 (3%). Swan 58 draws the least water, 7.2 ft — 1 ft less than Oyster 565.

Anyone with the link sees this comparison.

Key differences

Worked out from the published figures below — arithmetic, not opinion.

At a glance

Dark icons are the standard layout; faded ones are what the larger layout adds.

Length : beam is length divided by beam — the higher it is, the slimmer the hull. Multihulls read low by nature.

A figure marked with a quote mark was read from the builder's page. Open it for the exact line, the page and the date.

Model
SWAN 58

Nautor Swan

Swan 58
Oyster 565SII Highlights D 2

Oyster Yachts

Oyster 565
Overview
BrandNautor SwanOyster Yachts
ModelSwan 58Oyster 565
GenerationUnknownUnknown
Hull typeSailing MonohullSailing Monohull
PropulsionSailSail
Production statusIn productionIn production
Production start yearUnknownUnknown
Production end yearUnknownUnknown
DesignerGermán FrersUnknown
Dimensions
LOA62.7 ft59.4 ft
Hull length58.9 ft56.5 ft
Beam17.3 ft16.8 ft
Draft7.2 ft–12.5 ft8.2 ft
Displacement55,997 lb60,781 lb
Accommodation
Cabins3–44
Heads3Unknown
BerthsUnknown7
Performance & Rig
Main sail1,254 ft²Unknown
Jib1,049 ft²Unknown
GenoaUnknownUnknown
Upwind sail areaUnknownUnknown
Downwind sail area3,595 ft²Unknown
Engine power150 hp150 hp
Engine count11
Materials
Hull materialUnknownGRP composite
Deck materialUnknownUnknown
Mast materialUnknownUnknown
Keel typeUnknownstandard keel
Rudder typeUnknownUnknown
Sources

12 of 13 figures here carry the builder's own words

8 of 11 figures here carry the builder's own words

Size, to scale

Each boat's published length and beam seen from above, and its mast height and draft from the side, all drawn on one scale.

From above — length × beam
0 ft10 ft20 ft30 ft40 ft50 ft60 ftSwan 58: 62.7 ft × 17.3 ftOyster 565: 59.4 ft × 16.8 ftSwan 5862.7 ft × 17.3 ftOyster 56559.4 ft × 16.8 ft

Outlines are schematic; the dimensions are the builder's.

From the side — height above and depth below the water
WaterlinePerson, 5.9 ftSwan 58: air draft not published / 12.5 ftair draft not published12.5 ftSwan 58Oyster 565: 82.2 ft / 8.2 ft82.2 ft8.2 ftOyster 565

Speed, power & tanks

What the builders publish about how fast, how strong and how far — each figure on one scale for every boat.

Tanks

One scale per liquid across every boat: a tank twice the height holds twice as much.

  • Swan 58

    Fuel285 gal
    Water250 gal

  • Oyster 565

    Fuel251 gal
    Water193 gal

    27 gal of water per berth

How they sail, in numbers

Classic yacht-design ratios worked out from each builder's published figures. They compare boats; they don't grade them.

Sail area / displacement

How much sail the boat carries for its weight — its power in light air.

ModestCruiserPerformanceRacing162024Swan 58: 25.2
  • Swan 5825.2· Racing
  • Oyster 565not published: sail area
How it is worked out

sail area (ft²) ÷ (displacement as ft³ of seawater)^⅔

Swan 58: mainsail + jib, added up

Displacement / length

How heavy the boat is for its waterline length. Lower is lighter and quicker; higher is steadier and roomier.

UltralightLightModerateHeavyVery heavy100180270350Swan 58: 142Oyster 565: 190
  • Swan 58142· Light
  • Oyster 565190· Moderate
How it is worked out

displacement (long tons) ÷ (0.01 × waterline length in ft)³

Ballast ratio

The share of the weight carried in the keel — a rough guide to stiffness, though how deep that weight sits matters as much.

LowModerateHigh3040Swan 58: 30
  • Swan 5830· Moderate
  • Oyster 565not published: ballast
How it is worked out

ballast ÷ displacement × 100

Comfort ratio

Ted Brewer's measure of how gently a boat moves in a seaway. Higher means a slower, easier motion.

LightCoastalModerate offshoreHeavy offshoreVery heavy20304050Swan 58: 33.2Oyster 565: 39.9
  • Swan 5833.2· Moderate offshore
  • Oyster 56539.9· Moderate offshore
How it is worked out

displacement (lb) ÷ (0.65 × (0.7 × LWL + 0.3 × LOA) × beam^1.333), lengths in ft

Capsize screening

A guide from the inquiry after the 1979 Fastnet race: below 2 was taken as suited to ocean passages. It ignores hull shape and where the ballast sits.

Below 22 and above2Swan 58: 1.81Oyster 565: 1.71
  • Swan 581.81· Below 2
  • Oyster 5651.71· Below 2
How it is worked out

beam (ft) ÷ (displacement as ft³ of seawater)^⅓

Hull speed

Roughly the speed a displacement hull reaches before it has to climb its own bow wave.

  • Swan 5810.0 kn
  • Oyster 5659.7 kn
How it is worked out

1.34 × √(waterline length in ft), in knots

Most builders publish a light displacement. The ratios were defined on a loaded boat, so every boat here reads a little lighter than a surveyor's figure would — all alike, which keeps them comparable.

Worth adding to this comparison

The boats most like the ones above, by hull form, size and use.