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Mirror Offshore Mk Ii
Designer: E. G. Van De Stadt  ·  Builder: Gdb Marine Ltd./Elizabethan Marine  ·  First built: 1980
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About the Mirror Offshore Mk Ii

Originally developed as an evolution of the popular Mirror dinghy series, this offshore variant represents an interesting departure from the traditional small-boat Mirror design philosophy. While detailed specifications remain scarce, the Mk II designation suggests refinements over an earlier offshore model, likely incorporating lessons learned from initial sea trials and owner feedback. The Mirror Offshore concept aimed to translate the accessibility and simplicity that made the original Mirror dinghy famous into a more substantial sailing platform capable of coastal and light offshore work. This approach typically results in boats that maintain straightforward rigging and handling characteristics while offering the stability and seaworthiness needed for more challenging conditions. Given the Mirror brand's reputation for practical, no-nonsense designs, the Offshore Mk II likely emphasizes ease of maintenance and reliable performance over cutting-edge racing features. The boat would appeal to sailors seeking a honest, workmanlike vessel for coastal exploration and day sailing, particularly those who appreciate the Mirror lineage of sensible design and proven construction methods. Without comprehensive specifications available, prospective buyers should seek out existing owners and detailed surveys to fully evaluate this boat's capabilities and condition, as individual examples may vary significantly in equipment and maintenance standards.

Core Dimensions
LOA (Length Overall) 18.86 ft / 5.75 m
LWL (Waterline Length) 15.75 ft / 4.80 m
Beam 6.73 ft / 2.05 m
Max Draft 1.90 ft / 0.58 m
Displacement 1,700.00 lb / 771 kg
Ballast 380.00 lb / 172 kg
Sail Area (Reported) 152.00 ft² / 14.12 m²
Design & Construction
Hull Type Triple Keel
Rigging Type Masthead Sloop
Construction FG
Designer E. G. van de Stadt
Builder GDB Marine Ltd./Elizabethan Marine
First Built 1980
Last Built 1982
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
17.11
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
12.42
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
2.26
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. 5.32
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. 378.74
How It Compares

vs. Albin 57, Com Pac 19, Mirror Offshore Mk I, Oday 19, Starwind 19

This boat Similar boats
Dimensions
LOA
Mirror Offshore Mk Ii ★
18.9 ft
Albin 57
18.8 ft
Com Pac 19
19.0 ft
Mirror Offshore Mk I
18.9 ft
Oday 19
19.0 ft
Starwind 19
18.6 ft
LWL
Mirror Offshore Mk Ii ★
15.8 ft
Albin 57
16.4 ft
Com Pac 19
16.3 ft
Mirror Offshore Mk I
15.8 ft
Oday 19
16.7 ft
Starwind 19
15.6 ft
Beam
Mirror Offshore Mk Ii ★
6.7 ft
Albin 57
7.9 ft
Com Pac 19
7.0 ft
Mirror Offshore Mk I
6.7 ft
Oday 19
7.8 ft
Starwind 19
7.5 ft
Displacement
Mirror Offshore Mk Ii ★
1 lbs
Albin 57
1 lbs
Com Pac 19
2 lbs
Mirror Offshore Mk I
1 lbs
Oday 19
2 lbs
Starwind 19
1 lbs
Ballast
Mirror Offshore Mk Ii ★
380 lbs
Albin 57
562 lbs
Com Pac 19
800 lbs
Mirror Offshore Mk I
380 lbs
Oday 19
300 lbs
Starwind 19
395 lbs
Sail Area
Mirror Offshore Mk Ii ★
152 sq ft
Albin 57
167 sq ft
Com Pac 19
145 sq ft
Mirror Offshore Mk I
Oday 19
179 sq ft
Starwind 19
Performance
PHRF Rating (lower = faster)
Mirror Offshore Mk Ii ★
Albin 57
Com Pac 19
Mirror Offshore Mk I
Oday 19
220 s/nm
Starwind 19
288 s/nm
SA / Displacement (higher = more powerful)
Mirror Offshore Mk Ii ★
17.1
Albin 57
18.3
Com Pac 19
14.7
Mirror Offshore Mk I
Oday 19
17.9
Starwind 19
Ballast / Disp (higher = stiffer)
Mirror Offshore Mk Ii ★
Albin 57
31.9 %
Com Pac 19
40.0 %
Mirror Offshore Mk I
21.1 %
Oday 19
Starwind 19
29.3 %
Comfort Ratio (higher = more comfortable offshore)
Mirror Offshore Mk Ii ★
12.4
Albin 57
10.1
Com Pac 19
13.5
Mirror Offshore Mk I
Oday 19
11.9
Starwind 19
Capsize Screening (lower = safer)
Mirror Offshore Mk Ii ★
2.26
Albin 57
2.62
Com Pac 19
2.22
Mirror Offshore Mk I
Oday 19
2.45
Starwind 19
Displacement / Length (lower = lighter)
Mirror Offshore Mk Ii ★
Albin 57
178
Com Pac 19
205
Mirror Offshore Mk I
205
Oday 19
Starwind 19
159
Hull Speed
Mirror Offshore Mk Ii ★
5.3 kts
Albin 57
5.4 kts
Com Pac 19
5.4 kts
Mirror Offshore Mk I
Oday 19
5.5 kts
Starwind 19
Speed Number (higher = faster)
Mirror Offshore Mk Ii ★
Albin 57
3.1
Com Pac 19
2.4
Mirror Offshore Mk I
Oday 19
2.8
Starwind 19
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