(www.MaritimeCyprus.com) IMO's new interim guidelines on training seafarers for ammonia-fuelled ships arrive years before most of the newbuildings that will need them. That head start is worth more than it looks — but only if flag states, academies and owners actually use it. Shipping does not usually get ahead of its own risks. LNG bunkering matured for a decade before its training regime was fully codified in the STCW Code; the industry's habit has been to regulate the fuel after the fleet, and sometimes after the incident. The Interim Guidelines on Training for Seafarers on Ships Using Ammonia as Fuel, circulated by the IMO Secretariat on 6 July, break that pattern in a small but genuine way. The ammonia-fuelled orderbook is still thin, bunkering infrastructure barely exists in most ports, and yet the Organization has already told Administrations what a competent crew needs to know. That sequencing matters because ammonia is not simply "another alternative fuel" to be trained around with a find-and-replace of the LNG or methanol playbooks. Its defining hazard is not primarily flammability but toxicity — a colourless gas that is lethal at concentrations far below anything a nose can comfortably tolerate for long, corrosive to tissue and to certain alloys, and capable of the same low-temperature and pressure hazards as other liquefied gas cargoes on top of that. A crew member who is fluent in methane's fire triangle can still be dangerously unprepared for an ammonia vapour cloud drifting across a deck. A sensible, deliberately narrow architecture The Guidelines wisely resist trying to be a stand-alone code. They sit underneath the generic framework already set out in STCW.7/Circ.25 and the safety provisions of MSC.1/Circ.1687, adding only the ammonia-specific knowledge, understanding and proficiencies. The two-tier structure is equally sensible: basic training for anyone with a designated safety duty around the fuel, advanced training for masters, engineer officers