ARMOR Hecate diesel jet boat running with a long wake
Hecate
Jet Boats · Platform

Hecate Diesel Jet Boat: Offshore Range, Shallow-River Reach

A long-range diesel fish machine that crosses open water, then runs up a river in under a foot of water.

  • 29′-6″ × 9′
  • Yanmar 440 diesel
  • HamiltonJet HJX27
  • 38 kn (44 mph)
  • 2+ mpg

The Hecate is named for Hecate Strait, the open water between the British Columbia mainland and Haida Gwaii, and it was inspired by running those remote islands: long ocean crossings, then shallow river mouths and beaches that a propeller boat can't reach.

It's a 30-foot-class diesel jet boat, a real fish machine and an efficient long-distance runner. A single Yanmar 440 diesel drives a HamiltonJet HJX27 through a ZF gearbox, good for about 38 knots and 2+ mpg at cruise. The engine sits forward under a walkaround engine box, so the whole self-bailing aft deck is clear for fishing.

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Built your wayEvery size, layout and power package on this page is a starting point. Length, beam, layout, power and outfitting can all change, and we work it out with you in 3D CAD before any plate is cut.

Start your custom build
Built in Anacortes, WA, USAIn-house design & engineeringBuild capacity to 100′CNC router cutCNC formingPulse MIG & TIG weldingVertical integration: we do it allDiesel & waterjet experts

Specifications

Length29′-6″
Beam9′
Deadrise16°
PowerYanmar 6LY 440 hp diesel, ZF gearbox (diesel only)
PropulsionHamiltonJet HJX27 waterjet
Top speed38 kn (44 mph)
Economy2+ mpg at cruise
Fuel150 gal
DraftRuns in under 12″ of water
SeatingUp to 6 suspension seats (8 with the long cabin)
Deck3/16″ 5052, welded, self-bailing
Bottom / sides1/4″ 5086 / 3/16″ 5086
Keel3/8″ + 1/4″ beaching plate

Who it's for

Long-range fishing: big ocean water first, then rivers and deltas · Crew boat and charter work · Lodges and guides covering long distances every day · Expedition day runs (it's not an overnighter)

Expeditionary, not an overnighter

The Hecate covers ground. It's built for owners who run long distances to fish and then want to keep going up a river or across a shallow flat. It's more at home in the ocean than our Taku and finished to a higher level, and it's our best-selling jet boat. One of our customers runs a Hecate as a charter boat.

Build it your way

Choose the pieces. We engineer the boat around them.

Cabin

Standard or long cabin (up to 8 suspension seats); Alaskan bulkhead standard

Fishing layout

Rod storage, fish boxes and deck gear set up for how you fish

Electronics

Chartplotter, radar and communications to suit your waters

Popular options: Long cabin · Suspension seating · Electronics package

Sea-trial data

Measured on a Hecate sea trial: speed and fuel burn at each engine speed. Hover or tap a point for its numbers.

Speed
0102030401,5002,0002,5003,0003,5001,800 rpm: 7.8 kn (9.0 mph)2,000 rpm: 8.9 kn (10.2 mph)2,200 rpm: 10.0 kn (11.5 mph)2,400 rpm: 12.3 kn (14.2 mph)2,600 rpm: 20.3 kn (23.4 mph)2,800 rpm: 26.2 kn (30.2 mph)3,000 rpm: 30.8 kn (35.4 mph)3,150 rpm: 34.0 kn (39.1 mph)3,300 rpm: 36.9 kn (42.5 mph)37 knEngine rpmSpeed, knots
Fuel burn
0510152025301,5002,0002,5003,0003,5001,800 rpm: 4.2 gal/hr2,000 rpm: 5.9 gal/hr2,200 rpm: 7.8 gal/hr2,400 rpm: 9.8 gal/hr2,600 rpm: 12.2 gal/hr2,800 rpm: 14.3 gal/hr3,000 rpm: 18.0 gal/hr3,150 rpm: 20.4 gal/hr3,300 rpm: 24.1 gal/hr24.1 gal/hrEngine rpmFuel burn, gal/hr
Show the numbers
Engine rpmSpeedFuel burn (gal/hr)mpg
1,8007.8 kn (9.0 mph)4.22.14
2,0008.9 kn (10.2 mph)5.91.73
2,20010.0 kn (11.5 mph)7.81.47
2,40012.3 kn (14.2 mph)9.81.45
2,60020.3 kn (23.4 mph)12.21.92
2,80026.2 kn (30.2 mph)14.32.11
3,00030.8 kn (35.4 mph)18.01.97
3,15034.0 kn (39.1 mph)20.41.92
3,30036.9 kn (42.5 mph)24.11.76

Hecate hull #4 sea trial · Yanmar 440 diesel and HamiltonJet HJX27 · Your speed and fuel burn depend on load, power and conditions

How the Hecate is built

  • 1/4″ 5086 bottom and 3/16″ 5086 sides
  • 3/8″ vertical keel with a 1/4″ beaching plate
  • 3/16″ welded, self-bailing deck and 3/16″ transom
  • Engine forward under a walkaround engine box: the aft deck stays clear
  • Alaskan bulkhead standard
  • Single Yanmar 6LY 440 hp diesel, ZF gearbox, HamiltonJet HJX27

The ARMOR standard

  • Every part modeled in 3D CAD and reviewed with you before plate is cut
  • CNC-cut parts, plate-marked with forming and welding instructions, so every hull matches the drawing
  • Formed on a 12′, 200-ton CNC press brake
  • Welded to written procedures, to AWS D1.2 and AWS D3.7
  • Marine-grade 5086 and 5052 aluminum throughout

Built in our 16,000 sq ft Anacortes facility, with a full-length 5-ton bridge crane and room for vessels up to 100′. Because every part is drawn in 3D CAD and CNC-cut, we're set up for multi-boat and fleet contracts as well as one-off custom builds.
Warranty: 10-year limited hull warranty for commercial use; lifetime limited hull warranty for recreational use.

ARMOR Marine welder in a welding helmet and gloves, welding an aluminum hull in the Anacortes shop

Missions it serves

Recreation & FishingPassenger & River TransportCommercial & Workboats

Questions

It runs in under 12″ of water on plane.

The Hecate is built around one proven drivetrain: a Yanmar 440 diesel and ZF gearbox on a HamiltonJet HJX27. It's what gives the boat its range and economy.

The Hecate is built for long days, not overnights. For multi-day trips, look at the Nootka 36 or Chugach 39.

Yes. The Hecate has a 3/16″ welded, self-bailing deck.

Start your Hecate

We design every boat in-house, so we can build to your exact requirements and help you solve the technical problems a catalog boat can't.

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