Category: Marine insurance · Reviewed by Chrissie Anderson, Client Executive · Last reviewed 2026-06-05
A marine umbrella is an excess liability policy that sits above a primary marine liability and P&I programme, providing additional capacity for the largest single losses; in US-influenced markets the combined marine and non-marine excess product is known as a ‘bumbershoot’ policy.
Category: Marine insurance Also known as: marine excess liability, marine umbrella liability, bumbershoot First codified: market wordings developed by Lloyd’s marine syndicates from the 1950s Related legislation: Marine Insurance Act 1906 [1]
A marine umbrella is a policy of excess insurance written to respond above the limits of a primary marine liability programme — typically comprising P&I cover from a club, plus separately purchased charterers, terminal, ports, salvage or specialist liability covers depending on the operator’s profile. The umbrella attaches once the underlying primary covers are exhausted by a single qualifying loss or by aggregate losses in a policy period, and pays excess of that amount up to the umbrella’s own limit [3][4].
The cover is structurally similar to non-marine umbrella or excess liability cover but is underwritten by specialist marine markets and follows marine wording conventions. The largest marine umbrella placements are at Lloyd’s and in the Bermuda excess liability market, with limits per occurrence commonly extending to several hundred million US dollars. The umbrella may follow the form of the underlying primary policies, may follow only the wording of the primary marine liability layer, or may be a stand-alone wording with its own definitions and exclusions [4][5].
The US-origin term ‘bumbershoot’ refers to a marine umbrella that also extends to non-marine general liability of the assured, on the basis that a shipping or marine operator has overlapping liability exposures that benefit from a combined excess product. Bumbershoot cover is less common in the London market, where marine and non-marine programmes are typically kept separate, but is regularly seen in placements with US-headquartered insureds [4].
A marine umbrella is a contract of marine insurance falling within the Marine Insurance Act 1906, with the assured holding insurable interest by reason of the underlying liabilities the umbrella covers (s.5(2)). The contract is normally written on London market wordings that incorporate the duty of fair presentation under the Insurance Act 2015 and the standard warranty and condition provisions of the LMA model clauses [1][2].
The interaction between the marine umbrella and the underlying primary covers — particularly with mutual P&I cover written under club rules — requires careful drafting. P&I cover is provided on a ‘discretion’ basis in some respects (the club’s board has discretion to decline cover in certain edge cases) and the marine umbrella must specify how that discretion interacts with the umbrella’s drop-down or follow-form obligations. Many London market umbrella wordings exclude any cover that the underlying P&I would have provided but for the application of club discretion [4][5].
Sanctions, embargo and ESG-related exclusions have become significant in marine umbrella wordings. The LMA 3100 Sanctions and Termination Clause is incorporated into most placements, and individual placements may include further exclusions for sanctioned trades, Russian-origin or destination cargoes (depending on the precise sanctions regime), and certain coal- or hydrocarbon-related exposures driven by reinsurers’ underwriting policies [4].
A typical marine umbrella sits in a layered programme above a primary placement of, for example, the P&I club retention (US$10m for the 2024/25 policy year) plus the pooled and reinsured layer up to the International Group’s collective limit (approximately US$3.1bn per incident, with sub-limits for pollution and passenger and seafarer claims). A buyer with exposure to liabilities above the IG limit — typically large container operators, cruise lines and offshore operators — may buy an excess umbrella above the IG limit, or a ‘drop-down’ umbrella that attaches below the IG ceiling for specified non-poolable risks (passenger over the IG sub-limit, certain pollution exposures, cyber-related claims) [3][4].
For non-shipowner operators (charterers, terminal operators, ports, salvors), the marine umbrella sits above a structured primary placement comprising the relevant primary marine liability cover (CLI for charterers; CHF cover for terminals; ports and harbours wording for port authorities) and provides additional capacity to meet contractual requirements (typically driven by lender covenants, charterparty obligations, port authority bye-laws or class society requirements) [4][5].
Premium for marine umbrella cover is calculated based on the underlying primary premium, the limit purchased, the attachment point, the exposure profile of the assured (vessel tonnage, terminal throughput, charter volumes), and the claims experience. The market is cyclical: in soft phases capacity is plentiful and rates compress; in hard phases (such as the post-2018 market) capacity withdraws and rates rise sharply [4].
Stand-alone marine excess wording: written to the assured’s own wording with no automatic follow-form. Allows precise tailoring of cover but requires careful drafting to avoid gaps with underlying primary covers.
Follow-form marine umbrella: incorporates the primary wording by reference, with stated modifications and exclusions. Reduces drafting risk but inherits any defects or ambiguities in the primary wording.
Bumbershoot: combined marine and non-marine umbrella, prevalent in US placements. Provides a single excess facility for diverse liability exposures of the assured. Less common in the London market.
Lender’s mortgagee interest cover and lender’s additional perils cover: not strictly marine umbrella but related excess products covering the lender’s separate insurable interest in the vessel and its operations. Often placed alongside the marine umbrella for project-financed vessels.
A UK-listed offshore support vessel operator has a fleet of 18 vessels operating in North Sea, West African and Gulf of Mexico waters. The operator’s primary liability programme comprises P&I cover with a Group club (full IG-poolable cover up to approximately US$3.1bn per incident with sub-limits for pollution), charterers liability cover for time-chartered vessels in the fleet (US$500m), and shore-based operations liability of US$50m. The operator places a US$250m marine umbrella excess of the largest sub-limits in the primary programme, with attachment points specified for each underlying cover and an aggregate annual limit. The umbrella is led by a Lloyd’s marine syndicate with following markets from Bermuda and continental European reinsurers. Figures in this example are illustrative.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-05. Next review: 2026-12-05.
Apex Insurance Brokers Limited. Authorised and regulated by the Financial Conduct Authority, FRN 724952. Registered in England and Wales, Companies House 07014570. This entry provides general information about UK insurance concepts and is not regulated advice. Consult your insurance broker on your specific position.
Apex Insurance Brokers serves UK professional services firms and commercial businesses. Call 0117 325 0027, email hello@apexinsurancebrokers.co.uk, or request a quotation.
Get a quote