Bolger Birdwatcher

Description

The Birdwatcher is an innovative micro-cruiser sailboat designed by the prolific American naval architect Phil Bolger in the mid-1980s. First published in 1986 through Small Boat Journal and later detailed in Bolger's 1994 book Boats with an Open Mind, it's celebrated for its radical "slot-top" cabin—a fully enclosed, low-profile shelter with transparent panels that allow the skipper to sit inside while maintaining unobstructed views for sailing, motoring, or simply observing wildlife (hence the name). This design revolutionized small-boat camping by prioritizing visibility, simplicity, and seaworthiness over traditional aesthetics. Built from plywood (often using the "instant boat" stitch-and-glue method), it's lightweight, trailerable, and ideal for solo coastal or inland cruising. Bolger himself considered it one of his most original concepts, though it's paradoxically one of his least-built designs despite widespread discussion among wooden boat enthusiasts. The original Birdwatcher (sometimes called BW1) emphasizes sailing with rowing as a backup, but its narrow beam and cabin slot make rowing inefficient (about 2.5 mph in calm water). In response, Bolger revised it in 2004 as the Birdwatcher II (BW2), adding provisions for an outboard motor well and a jib for better light-air performance. Both versions are shoal-draft sharpies, self-righting due to low center of gravity, and forgiving for novice builders or sailors. 700 lbs.

Construction Details

Designer Bolger, Philip C.
Length 23.500 ft
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The standard boat dimensions

i -
j -
p 23 ft
e 12.67 ft
p2 -
e2 -
i2 -
j2 -

Blueprints

Sails

Sail Type JIBSAIL
Luff 15 ft - (4572 mm)
Foot 6.33 ft - (1929 mm)
Leech 13.083 ft - (3988 mm)
Length Perpendicular * 5.5 ft - (1676 mm)
Area * 41.26 ft²
Sail Type JIBSAIL
Luff 18.5 ft - (5639 mm)
Foot 9.5 ft - (2896 mm)
Leech 15 ft - (4572 mm)
Length Perpendicular * 7.67 ft - (2338 mm)
Area * 70.93 ft²
Sail Type GENOA
Luff 16 ft - (4877 mm)
Foot 8 ft - (2438 mm)
Leech 13.083 ft - (3988 mm)
Length Perpendicular * 6.51 ft - (1984 mm)
Area * 52.07 ft²
Sail Type SPRIT
Luff 22.75 ft - (6934 mm)
Foot 12.58 ft - (3834 mm)
Leech 24.4 ft - (7437 mm)
Tack Angle * 82.41 °
Diag (clew/throat) 24.5 ft - (7468 mm)
Head 0.17 ft - (52 mm)
Area * 143.52 ft²

Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.