Catamaran Insurance UK Specialist Broker

Why Catamaran Risk Is Structurally Different

Beam is the first issue. A 45-foot cruising catamaran may carry a beam of 25 feet or more. That changes marina berth costs, tidal window calculations in shallow anchorages, and — critically — the exposure when another vessel swings into your windward hull in a crowded Palma or Athens marina. A policy that rates your vessel purely on length overall without accounting for beam is underpricing the physical footprint of the risk.

The bridgedeck is the second structural consideration. Slamming damage to the bridgedeck and crossbeams is a known catamaran-specific peril. Many standard Institute Hull Clauses wordings do not explicitly address it, and some underwriters treat bridgedeck damage as a maintenance or design issue rather than an insured peril. Your policy should be explicit: slamming damage caused by sea conditions is a covered peril, not a wear-and-tear exclusion.

Twin engines and twin rudders mean twin points of failure, but they also mean that a single-engine loss rarely disables the vessel entirely. Underwriters who understand catamarans price this correctly. Those who do not may apply a higher total-loss loading that does not reflect the vessel's actual redundancy. When we approach the specialist market on your behalf, we make sure the underwriter is rating the right risk.

Hull and Machinery Cover: What the Policy Must Say

Your hull policy should be written on an agreed value basis. For a catamaran — where market comparables can be thin and replacement cost for a quality GRP or composite build can diverge sharply from second-hand market value — an agreed value removes the argument at claim time. Avoid indemnity-value wordings unless you have had a formal survey and are comfortable that the surveyed value reflects what it would actually cost you to replace the vessel.

The Inchmaree clause, incorporated into most modern hull wordings, extends cover to loss or damage caused by the negligence of masters, officers, or crew, and to latent defects in machinery. For a charter catamaran with rotating crew and high engine hours, this clause is not a technicality — it is the provision that keeps a mechanical failure from becoming an uninsured loss. Confirm it is in your wording, not assumed.

Sue-and-labour provisions require you to take reasonable steps to prevent or minimise a loss, and in return your underwriter reimburses those costs even if the underlying claim is not covered. If your catamaran goes aground on a reef off Antigua and you hire salvage assistance to prevent further damage, those costs should be recoverable under sue-and-labour regardless of whether the grounding itself is ultimately a covered loss. Know this clause before you need it.

Navigation limits matter more for catamarans than for monohulls because catamaran owners tend to range widely. A vessel that winters in the Caribbean, transits to the Mediterranean for summer, and lays up in a Turkish yard needs a policy with navigation limits that reflect that pattern — not a standard UK coastal waters wording with a Mediterranean extension bolted on at renewal. We build the navigation schedule around your actual cruising plan.

• Agreed value hull cover, not indemnity value
• Explicit bridgedeck and crossbeam slamming cover
• Inchmaree clause confirmed in the wording
• Sue-and-labour provision with no sub-limit below hull sum insured
• Navigation limits matching your actual cruising pattern: Med, Caribbean, Gulf
• Lay-up conditions that reflect where you actually lay up — Turkey, Grenada, Ras Al Khaimah

Third-Party Liability and the LLMC Question

Third-party liability cover for a catamaran needs to be sized against the Convention on Limitation of Liability for Maritime Claims (LLMC 1976, as amended by the 1996 Protocol). LLMC sets a floor on the liability you can limit to — expressed in Special Drawing Rights and calculated by reference to your vessel's gross tonnage. For a large cruising or charter catamaran, the LLMC tonnage-based limit can be a meaningful number. Your P&I cover should sit comfortably above it, because the convention's limitation regime is a ceiling on what a claimant can recover from you, not a ceiling on what you might spend defending the claim before limitation is established.

In practice, a charter catamaran operating in the Mediterranean under a MYBA or similar charter agreement will face contractual liability requirements that may exceed what a basic third-party section provides. Your charter contract likely requires you to carry a specified minimum liability limit and to name the charterer's interests. We review the charter agreement alongside the policy to make sure the two documents are consistent — a mismatch between your charter contract and your policy schedule is a gap that surfaces at the worst possible moment.

For vessels operating in or near the Gulf — Dubai, Doha, transiting the Strait of Hormuz — war and piracy exclusions in the standard hull and liability wording require separate war risk cover. The Joint War Committee Listed Areas designation affects your base premium and your war risk extension. If you are cruising the Red Sea corridor or transiting Bab-el-Mandeb, this is not optional cover.

Charter Operations: Cover That Matches the Contract

A catamaran used for commercial charter — whether bareboat, skippered, or crewed — is a different underwriting risk from a private yacht, and it needs a policy that reflects that. The moment you take a charter fee, a private pleasure yacht policy may be void. This is not a technicality buried in the exclusions; it is a fundamental change in the nature of the risk that most standard wordings address explicitly.

Charter cover for a catamaran should include: liability to charterers and their guests, loss of charter income following an insured loss (loss of hire), and — if you carry paying guests — passenger liability in line with the Athens Convention on the Carriage of Passengers by Sea. For vessels flagged under a UK or EU flag and operating commercially, MLC 2006 crew welfare obligations also apply, and your crew cover should be structured to meet them.

Loss of hire is often undervalued at placement. A catamaran out of service for a bridgedeck repair or a rudder replacement during peak Mediterranean season — July, August in the Balearics or the Cyclades — can lose several weeks of charter income. The loss-of-hire sum insured should reflect peak-season weekly rates, not an average across the year. We will ask you for your charter schedule and rate card when we approach underwriters, because that is the number that matters.

• Commercial charter endorsement — confirmed in writing, not assumed
• Passenger liability aligned with Athens Convention requirements
• Loss of hire cover sized to peak-season charter rates
• Crew cover meeting MLC 2006 obligations
• Charterer's liability and named-interest endorsements matching your charter contract

What to Bring to Renewal — and When to Start

Specialist catamaran underwriters want more information than a standard yacht submission. Start the renewal conversation at least eight weeks before expiry. For a charter vessel, or for any catamaran over 50 feet, ten to twelve weeks is more realistic. The specialist market is not a commodity market; capacity is placed with underwriters who know the vessel type, and those underwriters ask detailed questions.

A current survey — within three years for most underwriters, within two for vessels over fifteen years old — is the foundation of the submission. If your survey is approaching its limit, commission a new one before renewal rather than after. An out-of-date survey does not just affect your premium; it can affect whether an underwriter will quote at all, and it will certainly affect how a claim is handled if the vessel's condition at the time of loss is disputed.

We will ask you for the following before we approach the market on your behalf. Having these ready shortens the process and improves the quality of the terms we can secure.

• Current out-of-water survey report
• Vessel particulars: LOA, beam, draft, displacement, year of build, builder, hull material
• Engine hours and last service records for both engines
• Navigation plan for the coming policy year — cruising grounds, lay-up location
• Charter schedule and rate card if the vessel is used commercially
• Crew details: qualifications, certificates, ENG-1 medicals where applicable
• Claims history for the past five years
• Copy of current policy wording and schedule

Frequently asked questions

Do I need a separate policy for my catamaran, or can I extend my existing yacht policy?

You can extend some yacht policies to cover a catamaran, but the question is whether the wording was designed for the risk. Bridgedeck slamming, beam-related marina liability, and twin-engine machinery cover are catamaran-specific issues that a monohull wording may not address cleanly. We review the existing wording first. If it covers the risk adequately, we will tell you. If it does not, we will place a policy that does.

What happens if I take a charter booking before my commercial charter endorsement is confirmed?

If you take a fee for a charter and your policy does not carry a commercial charter endorsement, you are likely operating outside the terms of your cover. A claim arising during that charter — whether hull damage, a guest injury, or a third-party collision — may be declined. The endorsement needs to be in place before the first charter departs, not applied for afterwards. Contact us as soon as you have a charter booking confirmed.

My catamaran spends the summer in the Mediterranean and winters in the Caribbean. How does that affect my cover?

Your navigation limits need to reflect both cruising grounds and the Atlantic crossing between them. A policy written for Mediterranean waters only will not respond to a loss in the Caribbean or mid-Atlantic. We build the navigation schedule around your actual pattern — including the transatlantic passage windows — and make sure the war risk position is correct for any areas that fall within Joint War Committee Listed Areas designations.

How does the LLMC affect the liability limit I should carry?

The Convention on Limitation of Liability for Maritime Claims (LLMC) allows shipowners to limit their liability to a figure calculated by reference to the vessel's gross tonnage. For a large catamaran, that figure can be substantial. However, establishing limitation requires a legal process, and the costs of that process — plus any claims that exceed the limitation fund — fall on you. Your P&I or third-party liability cover should be sized to sit above the LLMC limitation figure, not below it, and should include legal defence costs.

What do you need from me to get a quote?

A current survey, full vessel particulars (LOA, beam, year of build, hull material, engine hours), your navigation plan for the coming year, crew qualifications, and your claims history for the past five years. If the vessel is used for charter, we also need your charter schedule and weekly rate card. The more complete the submission, the better the terms we can secure — specialist underwriters price the risk they can see clearly.

How long does it take to bind cover for a catamaran?

For a straightforward private cruising catamaran with a current survey and a clean claims history, we can typically have terms back within five to seven working days of a complete submission. For a charter vessel, or for a catamaran over 60 feet, allow ten to fourteen working days. If you are under time pressure — a purchase completing, a charter season starting — tell us at the outset and we will manage the timeline accordingly.