Seahorse 48: Preparing a Long-Range Trawler for Extended Voyaging

LOA: 48 feet, 5 inches • BEAM: 14 feet, 10 inches • POWER: single 150-hp John Deere 4045TFM diesel • SPEED: 6.5 knots cruise • RANGE: 6,825 nautical miles at 6.5 knots • TANKAGE: 2,000 gallons fuel, 250 gallons water • CONTACT: Seahorse Marine, Zhuhai, China, +86 (756) 550-1060. seahorseyachts.com

Overview

This Seahorse 48 is set up for serious long-range cruising. With a full-displacement hull and a single reliable John Deere 4045TFM diesel engine, she is optimized for steady, economical passages. The published cruise speed of 6.5 knots and the extensive tankage—2,000 gallons of fuel and 250 gallons of fresh water—give the model an exceptional theoretical range of 6,825 nautical miles at cruising speed, making it well suited to extended offshore passages where fuel and water independence are priorities.

Modifications and Equipment for Extended Voyaging

What type of modifications/special gear/systems/equipment did you have to install to prepare your boat for this type of voyaging? To make the boat capable of true long-range voyaging, several deliberate changes and additions were made. Extra fuel capacity was added to increase overall range and decrease the frequency of refueling stops — a critical factor in remote cruising. For redundancy and safety at sea, a second autopilot unit was installed; having dual autopilots reduces the risk of being left without steering control during extended passages.

Fresh water autonomy is another essential requirement: a reliable watermaker plus generous water storage was installed to ensure extended self-sufficiency. Food storage and preservation were addressed with two refrigerators and a large freezer, allowing for longer periods between provisioning stops and more flexibility in route planning. Finally, all safety gear was kept to an offshore standard — life rafts, EPIRBs, personal flotation devices, and other emergency systems suited to blue-water cruising are considered mandatory for this kind of voyaging.

Pushing the Limits: First Long Passage

What was the first voyage where you pushed the limits, distance-wise? The owners’ first significant long passage was from Thailand to India, a ten-day crossing. This initial voyage tested the boat’s systems, provisioning strategy, and crew routines over sustained time at sea, and it provided practical experience with watch schedules, fuel management, and equipment reliability under real offshore conditions.

Challenging Conditions and Scary Moments

What was your scariest moment at sea? Many anxious moments for cruisers happen close to shore or in crowded marinas, but the most frightening experience on this boat occurred in the Gulf of Mannar, between Sri Lanka and India. During that ten-day passage there were two days with very high winds—around 35 knots—with seas on the beam. Beam seas combined with strong winds create uncomfortable and potentially hazardous conditions for any vessel, making seamanship, proper trim, and cautious speed management vital.

Memorable Moments and Favorite Destinations

What can you tell us about your best cruising moment? The crew highlights the Philippines as a standout cruising area: crystal-clear water, vibrant coral and abundant marine life, unspoiled desert islands and scenic coastal scenery. The combination of warm water, inviting anchorages and hospitable local communities makes the region especially rewarding for cruisers seeking natural beauty and relaxed anchorages.

What is the favorite spot you’ve cruised to so far? Port Barton on Palawan in the Philippines stands out as a favorite. It offers an attractive anchorage with clear water, sandy beaches and low-key resorts, along with nearby deserted islands ideal for day trips and relaxed exploration. For cruisers who value scenic anchorages and a laid-back atmosphere, Port Barton is often a memorable stop.

This interview and boat profile originally appeared in the April 2018 issue.