13
Jan
(EAST BOOTHBAY, Maine) — Washburn & Doughty Associates launched a new tractor tugboat, Isabel McAllister, for New York-based McAllister Towing during a ceremony Saturday at the Maine shipyard. The 93-by-38-foot tug, generating 6,770 horsepower, features Caterpillar 3516E Tier 4-compliant engines linked to Schottel SRP 490 FP z-drives. Bollard pull is 84 tons. The newbuild is also equipped with 99-kW John…