OMM 600 Jaycat Boat Test

It’s nice to have space to move when you’re gamefishing. As Rick Huckstepp found, the Offshore Marine Master 600 Jaycat Walkaround has turned the issue of practical space on its head. There’s no cramped cockpit, pokey helm station or limited stowage space with this six-metre cat.

OMM 600 Jaycat Boat Test

Author and photography: Rick Huckstepp

This boat test ran in ISSUE 80 of BlueWater magazine –  AUGUST-SEPT 2010

For the complete feature, including all photos and information captions, you can purchase back-issues here

This cat has the convenience of a walkaround design but still offers good storage area in front of the helm and plenty of room at the helm itself. To boot, there appears to be no reduction in available cockpit space. It has the necessary foot-under access beneath the transom bulkhead and side pockets and padded inner coamings for the thighs for working large fish. Of course that’s provided you’re doing the fighting from the cockpit rather than the spacious, beamy bow area. This too is an excellent fishing platform.

Spacious livebait tanks in the aft corners hang over into the engine bay and do not encroach into the cockpit. Instead of a between-engine walkway at deck level, the OMM 600 has a short central transom door opening to a set of sturdy stairs that take you closer to the water for easier boarding and disembarkation. This style of rear entry also makes it easier for hauling a large fish on board.

The battery and deckwash pump system and hose are secreted in the transom bulkhead, freeing up the sidepockets for tackle trays and lure wraps. A shallow upper sidepocket on each side offers further handy stowage for smaller items. Its low profile will not interfere with an angler’s knees when doing stand-up battle. The padding on the inside of the coamings will also be appreciated.

At The Helm

The helm seat module has a built-in refrigerator, opening into the centre of the companionway. The rear of this module drops down into an observer’s seat with a padded top. Beneath this, an insulated area will hold frozen or rigged baits. A similar-shaped module under the passenger’s seat extends forward and will hold plenty of ice or serve as a slurry tank for fish you take home for the table. The modules on this side of the boat as are easily removed for modification or replacement with some other form of seating, or perhaps a galley.

The wheelhouse looks a little like a Popemobile, but is quite spacious. The roof offers plenty of headroom and has stowage capability up top. There are large sliding Perspex windows on each side and a panoramic front screen of hardened glass. This pane has been pre-stressed in a convex shape to reduce reflection off the inside of the cockpit.

Electronics cabinets will need to be gimbal-mounted on the top of the dash; there’s enough room to take a couple of the larger versions available. The test boat had an overhead console running abeam, which was in the process of having radios fitted.

Cabin Room

The downside to almost all catamaran hulls is the pokey space available in what is erroneously called the ‘cabin’. Rarely can one comfortable enter, let alone stay within, these cramped areas and few have any step-down leg room. In this last respect, the Jaycat is no different, but it does have a surprising amount of room in the cabin. The access is such that one can get inside with reasonable ease and manhandle tackle back to a crewmember. Once inside, there is ample room to crawl around and two adults could sleep here across the beam.

In the portside sponson, a macerator toilet is fitted under a bi-fold hatch, which closes flush to the deck when not in use. The plumbing gear is accessible via a hatch at the passenger’s feet and the passenger module itself is easily unbolted to give full access to the holding tank. The corresponding space in the opposite sponson is a cavernous stowage pit, large enough for an adult to enter.

The front bulkhead of the cabin has vertical hatches accessing limited stowage. The wiring for the front walkaround LED lighting is recessed through here and could be damaged by gear rolling around in the stowage pocket. A rethink is necessary.

Drive Time

The pair of Suzuki 115hp outboards fitted to the test boat performed nicely. The combination of water and air pressure in the tunnel between the hulls provided graduated lift on acceleration, to the point where it was nearly impossible to detect holeshot. Rather, the 600 glided forward and onto the plane effortlessly. Counter-rotating propellers freed up any torque at the helm and when backing down, as you would onto a fish, steerage was precise. When going astern, a minimal amount of water came onto the deck, only to drain away quickly.

Steering was effortless in and out of the chop over the Noosa Bar and, not unlike the majority of cat hulls, this one leant outwards on turns. The ride is as soft as you are going to get in a 6m cat and in this case it was quiet as well, thanks to the injection of buoyancy foam into under-deck voids. Out from the bar in the smooth water we cruised at 4300rpm for 46kph. At full throttle, 5950rpm produced a respectable 68.5kph.

This is a handy bluewater catamaran that mixes it with the big leaguers when it comes to practical fishing space, roomy helm station and stowage areas. It has the agility that you need and expect from a smallish, trailerable light-tackle sportfishing machine.


  • Very soft ride with low levels of ambient noise through hull.
  • Excellent workmanship throughout.
  • Unusually large amount of cabin space for a catamaran hull.


  • Fuel: 180L x 2
  • People berthed: 2
  • People – day: 6
  • Max weight (people, luggage, engines): 975kg
  • Minimum rec/hp: 75hp x 2
  • Maximum rec/hp: 115hp x 2
  • Maximum transom engine weight: 400kg total


  • Material: Aluminium – 4mm bottom sides and decks
  • Length overall: 6.3m
  • Beam: 2.5m
  • Weight: 2500kg towing (dry)
  • Towing: Landcruiser or Nissan Patrol equivalent


  • Make/model: Suzuki DF115 x 2, extra-long shaft
  • Type: four-cylinder, 4-stroke, 16-valve DOHC
  • Weight: 194kg each
  • Rated hp: 115hp each
  • Displacement: 1950cc each
  • Gearbox ratio: 2.59:1
  • Propeller: Solas four-blade

SPECIFICATIONS: Offshore Marine Master 600 Jaycat
Options fitted: Engine upgrade, hardtop glass screen, ice box and stowage, modules under seats, electric toilet and holding tank, windscreen wiper, Humminbird electronics, deckwash, LED lighting.  

OMM 600 Jaycat Boat Test

Author and photography: Rick Huckstepp
Supplied by: Offshore Marine Master

This boat test ran in ISSUE 80 of BlueWater magazine – AUGUST-SEPT 2010

For the complete feature, including all photos and information captions, you can purchase back-issues here

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