Powercat vs Monohull for Offshore Fishing: Which Is Right for You?

A powercat (power catamaran) offers greater stability at rest, more deck space for its length, and a drier ride, while a monohull is typically lighter to tow, cheaper to buy and power for the same length, and handles following seas in a way many traditional boaties expect. For offshore fishing, the right choice depends on how you fish, how far you run, and what you tow with. Kingfisher builds both in plate aluminium — though the vast majority of boats leaving our Tauranga factory are powercats, so we’ll declare our bias up front and still give the monohull its honest due.

Stability at rest: the powercat’s signature advantage

Twin hulls spread buoyancy wide, so a powercat barely rolls when stopped — which is most of what a fishing boat does. Drifting, at anchor, working a deep drop with three people on one side: a powercat stays flat where a monohull of the same length leans and rocks. For divers and spearos climbing back aboard, and for anyone prone to seasickness at rest, this is the single biggest difference between the two hull types.

Ride and handling underway

Into a head sea, a powercat’s hulls slice rather than pound, and the tunnel between them cushions the ride — most people find a cat noticeably softer and drier punching into chop. A well-designed monohull with a deep-V hull is no slouch, and many experienced skippers prefer how a monohull leans naturally into turns and tracks in a following sea, where cats handle differently (flatter and, in some conditions, with a distinctive motion that takes getting used to). Neither is “better” — they’re different sensations, and time on the water in each is worth more than any article.

Deck space and fishability

Beam is where the cat wins on paper: a [5.1m] powercat carries close to the deck area of a substantially longer monohull, because the full width runs further forward. More room to fish more people, mount more gear, and move around a fight. Monohulls counter with simpler layouts.

Towing, storage and power

• A powercat of a given length is usually wider. Kingfisher powercats from the 450 to 730 remain within standard towing width limits.
• Twin outboards are common on cats (though singles exist at the smaller sizes), which can mean higher purchase and servicing costs than a single-engine monohull of similar length.
• Like-for-like, expect a monohull to be somewhat lighter to tow; expect the cat to repay the difference in stability and usable space.

Cost

Two hulls take more aluminium and more build hours than one, so a powercat generally costs more than a monohull of the same length — but compare by deck space and capability rather than length and the gap narrows considerably. Pricing on built-to-order boats varies with spec and engine choice; your dealer can quote both configurations side by side.

So which should you choose?

Choose a powercat if stability at rest matters most — diving, longline or deep-drop fishing, seasick-prone crew — or if you want maximum fishable deck per metre of boat.

Choose a monohull if you tow often with a mid-size vehicle, prefer traditional handling, or want the simplest ownership package.

Frequently asked questions

Are powercats more stable than monohulls? At rest and at drift, yes — noticeably. Underway, both are stable in different ways; cats run flatter, monohulls lean into turns.

Are powercats good in rough water? Yes — the twin-hull ride is soft and dry into a head sea, which is why powercats are popular for offshore bar crossings and open-water fishing in New Zealand and Australia.

Do powercats need two engines? Not always. Smaller powercats (such as the Kingfisher 390 – 570) can run a single outboard; larger cats typically run twins, which also adds get-home redundancy offshore.

Is a powercat harder to tow? They’re wider than a monohull of the same length, so check beam against your local towing width limit — Kingfisher’s trailerable powercats are designed to tow within standard limits.

Which does Kingfisher recommend? Honestly? Ask anyone in our workshop and they’ll tell you the cat — the overwhelming majority of boats we build are powercats, and the stability at rest and soft, dry ride are exactly why owners keep choosing them. We build our monohulls for good reasons too: traditional handling, a narrower tow, and the bigger cabin layouts of the 670 and 730. But if you’re on the fence, get a ride on a powercat first — it usually makes its own argument.