Hull

A Classic Trawler

Her hull form is ideal for Northwestern waters. Built by Delta on one of its enduring Bering Sea-worthy fish boat hulls, she is a full-keel, single-screw trawler with a 12-inch skeg plated on the bottom with one inch of steel. Her fiberglass hull is six inches thick at the turn of the bilge. She is, in all respects, a brawny little ship. 

 

Sea Lion is a very roomy boat.With her 10.5 foot draft and 20-foot beam she has extraordinary cubic capacity for a 70-foot boat.  For disciples of Robert Beebe's Passagemaker, her D/L Ratio is 245.  Her spacious interior reflects her ample cube:  accommodations for eight in three double staterooms and two single cabins; a generous galley and facing bar/service counter; a dining room with seating for eight; a large salon; an aft deck with table seating for eight; tankage for 4,500 gallons of fuel and 900 gallons of water (with 3,800 gpd water-making capacity); a stand-up, walkaround engine room; a large aft hold and an extra-large lazarette with four hatches three of which are hydraulically operated. .

 

Her propulsion is a turbo-charged Cat 3408 turning a 48-inch, five-blade single screw.

 

She is highly maneuverable with a 4-foot prop turning in front of an 8-foot rudder and
with hydraulic bow and stern thrusters to boot.

 

For active roll stabilization she has Naid stabilizers; and for passive stabilization, she has two large bilge keels on each side of the hull. She also has a bulbous bow which can be filled with seawater for ballast to depress pitching in head sea conditions.

Sea Lion's prop, shaft and rudder are deep down under the stern and shielded by the full breadth of the keel forward as well as by the skeg and by the shoe which completely underlies the running gear. Not only could the boat cross a log without damage to the prop, she was designed to rest on her skeg on the bottom at low tide.

 

Twin-screw semi-displacement boats, by comparison,  necessarily must locate their running gear on struts placed toward the outside edges of a relatively shallow hull and thus expose them to flotsam and gill nets (prevalent in B.C. and S.E. Alaskan waters).