The shipping industry operates on a peculiar framework. A shipowner lends his chattel to a charterer, who provides the services of ocean carriage and in return pays a charterhire to the shipowner and still makes a sizable profit out of the entire transaction. It sounds all very organic, however, centuries of this trade have brought on certain codes of conduct which, in today’s day and age, have hardened into law. Charterers may direct the ship’s employment, however, certain rights, liberties and liabilities continue to rest with the shipowner, largely depending on the charterparty concluded. A charterer’s right to direct a vessel’s employment is a defining feature of a time charter, but not an unrestricted power of command. English law limits the orders a charterer may give and allocates the consequences of complying with them. The safe-port obligation is at the core of that allocation, alongside the separate rules on employment, navigation and indemnity. The safe-port obligation is the charterer's promise, given each time it directs the vessel to a port, that the ship will be able to reach that port, do its business and sail out without being exposed to any foreseeable danger the port itself creates. The safe-port test came from Leeds Shipping Co Ltd v Société Française Bunge SA (The Eastern City). The Court of Appeal held that, absent some abnormal occurrence, a port must permit the vessel to reach, use and leave it without exposure to danger that cannot be avoided by good navigation and seamanship. This formulation matters because safety is not assessed by reference to the port in isolation. The vessel, the relevant period and the characteristics of the port altogether form the inquiry.

The literature treats the safe-port promise as a qualification on the charterer’s otherwise extensive employment rights: Howard Bennett, “Safe Port Clauses”, in D Rhidian Thomas (ed), Legal Issues Relating to Time Charterparties (Informa, 2008), pp 51–60; “The Safe Port Promise of Charterers from the Perspective of the English Common Law” by D Rhidian Thomas (2006) 18 SAcLJ 597, 598–600.

The obligation is prospective. In Kodros Shipping Corp v Empresa Cubana de Fletes (The Evia (No 2)), the House of Lords considered a vessel trapped at Basrah by the outbreak of the Iran-Iraq war, rejecting the notion that a charterer guarantees against every subsequent development — even a political or military one. The date for judging the promise is the date of nomination, though a fresh issue can arise if a charterer had a later chance to redirect the vessel. Coghlin et al, Time Charters, 7th ed (Informa Law, 2014), pp 197–203. The clearest statement of the resulting risk allocation is Gard Marine & Energy Ltd v China National Chartering Co Ltd (The Ocean Victory), where a vessel was trapped at Kashima by long waves and severe gales, a combination unforeseen in the port’s 35-year record. The Court held abnormal occurrence, not a breach: owners answer for dangers avoidable by good navigation and seamanship; charterers assume risks normal for the vessel at the nominated port; abnormal occurrences fall outside the undertaking altogether. The decision identifies that charterers are not insurers of shipowners against every foreseeable peril during the charter.

The safe-port obligation is only part of the picture: a charterer’s commercial authority must also be distinguished from the master’s navigational function. In Whistler International Ltd v Kawasaki Kisen Kaisha Ltd (The Hill Harmony), charterers instructed a particular route; the master preferred another, but the House of Lords held that direction concerned employment, not navigation. A master cannot disregard a commercial instruction merely by calling it navigational though a genuinely serious safety concern still justifies departure, so the real division is more than a simple “commercial” versus “navigational” split. Coghlin et al, Time Charters, 7th ed (Informa Law, 2014).

Following a charterer’s order without question raises a separate issue. In Triad Shipping Co v Stellar Chartering & Brokerage Inc (The Island Archon), the Court of Appeal recognised an implied indemnity for losses arising from charterers’ employment orders. The principle reflects the bargain owners place the vessel at charterers’ disposal, so the charterer bears losses from exercising that authority where the owner has not assumed the relevant risk. This principle, however, has limits. In ENE Kos 1 Ltd v Petroleo Brasileiro SA (The Kos), the UKSC held indemnity does not transfer ordinary risks the owner has agreed to bear; it depends on the charterparty’s proper construction and a sufficient causal connection between the order and the loss. That doctrine was revisited in Sino East Transportation Ltd v Grand Amazon Shipping Ltd (The Grand Amanda) Henshaw J rejected the idea that the indemnity requires change of circumstances after the charterparty was concluded, the real questions being whether owners had agreed to bear that risk and whether the charterers’ order was effective cause of the loss. A recent decision moves beyond physical risk to a vessel altogether. In Tonzip Maritime (Singapore) Pte Ltd v 2Rivers Pte Ltd (The Catalan Sea), the Court of Appeal held that a sanctions clause permitting owners to refuse an order in their reasonable judgment required only a real risk of sanctions exposure, not proof that a breach was more likely than not, reversing the Commercial Court and finding that the owners’ refusal to load had, on the facts, been reasonable. The Catalan Sea sits outside safe-port doctrine altogether. It turns on a sanctions clause, and its contribution is contractual: charterparties can allocate the limits of commercial employment by reference to regulatory exposure as well as physical safety, reserving to owners a right to refuse an order for the legal consequences of performing it. Together, these cases draw the boundary differently from the way it is conventionally described: not charterer control against master control, but commercial authority against assumed risk, allocated through three distinct mechanisms: a strict warranty for safe ports, a causation-based indemnity for employment orders, and a reasonableness review of discretion for a clause like the one in The Catalan Sea. In each, the outcome is who bore the risk, not who issued the instruction.

A charterer’s order must fall within the authority the charterparty confers. The master’s professional responsibility remains relevant wherever an order raises genuine navigational danger. Mandatory law may bar performance altogether. Where a lawful order still causes loss, the charterparty’s express or implied risk allocation decides whether it stays with the owner or shifts unto charterer through an indemnity. This position matters well beyond traditional unsafe-port disputes: chartering decisions now sit alongside sanctions, armed conflict, governmental intervention and regulatory exposure, so a voyage may be physically practicable yet legally problematic, or politically difficult without being an unsafe-port case at all. The modern charterparty is better understood as delegated commercial authority operating within a network of contractual limitations and risk allocations. It isn’t unfettered operational control over the vessel.

The question, then, is not simply whether a charterer can give an order. It is whether the order is one the charterer was entitled to give, whether the owner and master are required to execute it, and, if compliance with that order causes loss to the vessel, which party agreed to bear the risk. The answer lies within the charterparty itself: freedom of contract determines how risk is allocated, but it does not mean a charterer who gives a valid order can necessarily escape consequences.