Fatigue onboard the ship is one of the major safety and performance concerns for seafarers. Ship working hours become a very important aspect of not only a vessel’s ability to function safely and effectively but the efficiency of its crew and officers too. Failure to maintain individual seafarers’ work hour records that comply with the global format adopted jointly by the International Labour Organization (ILO) and the International Maritime Organization (IMO) could result in Port State Control difficulties, including possible ship detention.