Southern Cross 28 (Gillmer 28)

Southern Cross 28 (Gillmer 28)

Description

The Southern Cross 28 (also known as the Gillmer 28) is a classic American double-ended cutter designed by Thomas C. Gillmer as a capable bluewater-capable pocket cruiser. It was first built in 1978 by C. E. Ryder Corporation (Bristol, Rhode Island), with production running primarily through the early 1980s (factory-finished boats and kits). Approximately 66 Southern Cross 28s were built, along with about 6 Gilmer 28s (the kit version name used in the 1980s to distinguish from completed boats), for a total of roughly 70–72 hulls; many were sold as bare hulls or partial kits for owner completion. The boat features heavy fiberglass construction (thick laminate with foam core in the hull and balsa in the deck), a cutaway forefoot with encapsulated lead ballast, a skeg-hung rudder, and a traditional salty appearance with a long bowsprit, pronounced sheer, and pleasing lines—making it a rugged, seaworthy vessel popular with voyagers despite its modest speed. Key features include a masthead cutter rig (with twin forestays and a self-tending staysail on a boom in some setups), basic but functional accommodations for 4, and a reputation for solid offshore performance (including at least one circumnavigation).

Construction Details

Designer Tom Gillmer
Builder C. E. Ryder Company in Bristol, Rhode Island (USA)
Length 28.000 ft
LOA 30.420 ft
LWL 20.170 ft
Beam 8.500 ft
Displacement 8500 lb
Ballast 3400 lb
Max Draft 4.670 ft
Year Built 1978
Request A Sail Quote

The standard boat dimensions

i 34.80 ft
j 13 ft
p 31 ft
e 12.17 ft
p2 -
e2 -
i2 -
j2 -

Sails

Southern Cross 28 (Gillmer 28) - MAINSAIL

Luff * 31 ft - (9449 mm)
Foot * 12.17 ft - (3709 mm)
Leech * 32.67 ft - (9958 mm)
Tack Angle * 88 °
Diagonal * 32.91 ft - (10031 mm)
Head (inches) * 5.25 in - (133 mm)
Area * 194.52 ft²
Edit in Calculator

Southern Cross 28 (Gillmer 28) - JIBSAIL

Luff * 29.72 ft - (9059 mm)
Foot * 17.72 ft - (5401 mm)
Leech * 25.14 ft - (7663 mm)
Percentage LP * 115 %
Length Perpendicular * 14.95 ft - (4557 mm)
Deck Angle * 11.97 °
Area * 222.19 ft²
Edit in Calculator

Southern Cross 28 (Gillmer 28) - GENOA

Luff * 35.29 ft - (10756 mm)
Foot * 21.43 ft - (6532 mm)
Leech * 32.82 ft - (10004 mm)
Percentage LP * 150 %
Length Perpendicular * 19.5 ft - (5944 mm)
Deck Angle * 4.03 °
Area * 344.06 ft²
Edit in Calculator

Southern Cross 28 (Gillmer 28) - DRIFTER

Luff * 35.29 ft - (10756 mm)
Foot * 22.4 ft - (6828 mm)
Leech * 31.13 ft - (9488 mm)
Perc LP * 150 %
Length Perp * 19.5 ft - (5944 mm)
Deck Angle * 9 °
Area * 344.07 ft²
Edit in Calculator

Southern Cross 28 (Gillmer 28) - ASYMMETRICAL

Luff * 35.29 ft - (10756 mm)
Foot * 21.45 ft - (6538 mm)
Leech * 32.47 ft - (9897 mm)
Perc LP * 165 %
Area * 568 ft²
Edit in Calculator

Southern Cross 28 (Gillmer 28) - STORMJIB

Luff * 20.43 ft - (6227 mm)
Foot * 10.11 ft - (3082 mm)
Leech * 16.02 ft - (4883 mm)
Perc LP * 60 %
Length Perp * 7.8 ft - (2377 mm)
Deck Angle * 19.05 °
Area * 79.65 ft²
Edit in Calculator

Southern Cross 28 (Gillmer 28) - STORMTRYSAIL

Luff * 12.57 ft - (3831 mm)
Foot * 11.55 ft - (3520 mm)
Leech * 10.47 ft - (3191 mm)
Length Perp * 10.47 ft - (3191 mm)
Tack Angle * -25 °
Area * 57 ft²
Edit in Calculator

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.

Comments

Portable hotknife

© 2025 Good Old Boat, Inc. All rights reserved