Irwin 37 mark 5

The Irwin 37 mark 5 is a 37.01ft cutter or ketch designed by Ted Irwin and built in fiberglass by Irwin Yachts between 1981 and 1982.

It accomodates 5 people in 2 cabins plus salon.

The Irwin 37 mark 5 is a heavy sailboat which is under powered. It is stable / stiff and has an excellent righting capability if capsized. It is best suited as a bluewater cruising boat. The fuel capacity is average. There is a good water supply range.

Irwin 37 mark 5 for sale elsewhere on the web:

Main features

Model Irwin 37 mark 5
Length 37.01 ft
Beam 11.52 ft
Draft 4 ft
Country United states (North America)
Estimated price $ 35000

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Sail area / displ. 13.62
Ballast / displ. 39 %
Displ. / length 330.69
Comfort ratio 37.23
Capsize 1.70


Hull type Monohull fin keel with rudder on skeg
Construction Fiberglass
Waterline length 29.99 ft
Maximum draft 4 ft
Displacement 19995.90 lbs
Ballast 7804.35 lbs
Hull speed 7.34 knots

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Rigging Cutter or ketch
Sail area (100%) 624.95 sq.ft
Air draft 0 ft ??
Sail area fore 367.48 sq.ft
Sail area main 257.36 sq.ft
I 41.99 ft
J 17.49 ft
P 35.50 ft
E 14.50 ft


Nb engines 1
Total power 40 HP
Fuel capacity 85 gals


Water capacity 187 gals
Headroom 0 ft
Nb of cabins 2
Nb of berths 5
Nb heads 2

Builder data

Builder Irwin Yachts
Designer Ted Irwin
First built 1981
Last built 1982
Number built 0 ??