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Compass 31 Ms
Designer: E. Björn Jensen  ·  Builder: Lindenger Compass Yachts A/S  ·  First built: 1971
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About the Compass 31 Ms

With limited documentation available, the Compass 31 Ms represents a relatively uncommon entry in the competitive 31-foot sailboat market. This yacht appears to be designed primarily for coastal cruising, offering a balance of performance and comfort that appeals to sailors seeking weekend adventures and extended coastal passages. The "Ms" designation in the model name suggests this may be a modified or updated version of a base Compass 31 design, potentially incorporating refinements based on owner feedback or evolving sailing preferences. Compass yachts have historically focused on practical sailing characteristics rather than cutting-edge racing features, making their boats appealing to cruising sailors who prioritize reliability and ease of handling. Given the size category, the Compass 31 Ms likely features a moderate displacement hull designed for steady sailing in various conditions. The beam and interior layout would typically accommodate comfortable overnight cruising for a small crew, with enough performance capability for spirited day sailing. While not extensively documented in sailing literature, boats in this class from smaller manufacturers often offer good value for sailors seeking solid construction and honest sailing characteristics without premium pricing. The limited available information suggests this model may have had restricted production numbers.

Core Dimensions
LOA (Length Overall) 31.17 ft / 9.50 m
LWL (Waterline Length) 25.26 ft / 7.70 m
Beam 10.17 ft / 3.10 m
Max Draft 4.92 ft / 1.50 m
Displacement 11,023.11 lb / 5,000 kg
Ballast 4,409.25 lb / 2,000 kg
Sail Area (Reported) 462.85 ft² / 43.00 m²
Design & Construction
Hull Type Long keel w/rudder on skeg
Rigging Type Masthead Ketch
Construction GRP
Designer E. Björn Jensen
Builder Lindenger Compass Yachts A/S
First Built 1971
Last Built 1978
Owner Reviews

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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
15
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
28.69
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
1.83
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 6.73
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 917.91
How It Compares

vs. Contest 31, Irwin 31, Niagara 31

This boat Similar boats
Dimensions
LOA
Compass 31 Ms ★
31.2 ft
Contest 31
31.2 ft
Irwin 31
31.1 ft
Niagara 31
31.3 ft
LWL
Compass 31 Ms ★
25.3 ft
Contest 31
23.4 ft
Irwin 31
22.3 ft
Niagara 31
24.3 ft
Beam
Compass 31 Ms ★
10.2 ft
Contest 31
9.3 ft
Irwin 31
9.6 ft
Niagara 31
10.3 ft
Displacement
Compass 31 Ms ★
11 lbs
Contest 31
10 lbs
Irwin 31
9 lbs
Niagara 31
8 lbs
Ballast
Compass 31 Ms ★
4 lbs
Contest 31
5 lbs
Irwin 31
3 lbs
Niagara 31
3 lbs
Sail Area
Compass 31 Ms ★
462 sq ft
Contest 31
386 sq ft
Irwin 31
448 sq ft
Niagara 31
492 sq ft
Performance
PHRF Rating (lower = faster)
Compass 31 Ms ★
Contest 31
219 s/nm
Irwin 31
192 s/nm
Niagara 31
162 s/nm
SA / Displacement (higher = more powerful)
Compass 31 Ms ★
15.0
Contest 31
12.9
Irwin 31
15.9
Niagara 31
19.7
Ballast / Disp (higher = stiffer)
Compass 31 Ms ★
Contest 31
Irwin 31
39.6 %
Niagara 31
44.4 %
Comfort Ratio (higher = more comfortable offshore)
Compass 31 Ms ★
28.7
Contest 31
32.2
Irwin 31
29.4
Niagara 31
21.1
Capsize Screening (lower = safer)
Compass 31 Ms ★
1.83
Contest 31
1.71
Irwin 31
1.81
Niagara 31
2.05
Displacement / Length (lower = lighter)
Compass 31 Ms ★
Contest 31
Irwin 31
389
Niagara 31
250
Hull Speed
Compass 31 Ms ★
6.7 kts
Contest 31
6.5 kts
Irwin 31
6.3 kts
Niagara 31
6.6 kts
Speed Number (higher = faster)
Compass 31 Ms ★
Contest 31
1.1
Irwin 31
1.1
Niagara 31
2.4
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