Luna's Specifications

National Register Of Historic Places 1983
Boston Landmark 1985
National Historic Landmark 1989

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Owners: Mystic Steamship Co., Boston MA
Operated By: Boston Tow Boat Co., Boston, MA
Design: John Alden Co. Boston, MA 1930
Built: M. M. Davis Shipyard, Solomons, MD
Equipment Installed: Bethlehem Shipbuilding CO.,
East Boston, MA

Launched: July 29, 1930
Completed: October 17, 1930
L.O.A.: 98
Beam: 24
Displacement: 335 Tons
Draft: fwd: 12, aft: 13

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Hull: Oak on oak, with yellow pitch pine ceiling plank:

frames: 6" x 12" oak on 22" centers
planking: upper four planks on sheer:

    4" x 10", 4" x 12", then 3" thick down to garboard

bilge: 3" x 10" yellow pine
bilge strakes: 6" x 8" yellow pine
ceiling: 4" x 8" yellow pine

Shelf: 3 ea. 6" x 8" yellow pine edge fastened
Keel: 12" x 12" white oak

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Diesels: WINTON 129, solid (airless) injection, 12-1/2" x 16",

       6 cylinder  330 B.H.P., @300 rpm each.
Direct connect to generators

Generators: General Electric, Two @ 213K.W. each
Exciters: GE Two @ 25K.W. each
Main Motor: GE One double armature, 516H.P. @125rpm

Fuel Capacity: 21 tons
Steering: Electro-Hydraulic system.
Max Speed:11 knots @ 130 rpm, (650 S.H.P.)