The International Medical Guide for Ships (IMGS, WHO 3rd edition 2007), the IMO/ILO/WHO Joint Guidelines, and MLC 2006 Regulation 4.1 govern the medical equipment, medicines, and care every ship must provide. Flag states publish national annexes (UK MS Notice 1768, US 46 CFR 184.610, Norwegian Maritime Authority guidance) with country-specific items. Verification at MLC inspection.
Sources: International Medical Guide for Ships (WHO 3rd edition 2007); IMO/ILO/WHO Joint Guidelines on Maritime Medical Examinations; MLC 2006 Reg. 4.1 + Standard A4.1; STCW Reg. VI/4; MSC/Circ.857 (MFAG); ILO/WHO publication 'International Medical Guide for Ships' (free download). National variants: UK MS Notice 1768; US 46 CFR 184.610. See also injury at sea, medical help, CIRM, MFAG.