СУПЕР МЕГА УЛЬТРА СРОЧНО!!! Найти 10 орфографических,2 грамматические и 1 фактическую ошибки. Помогите пожалуйста

10 в написании и 2 в грамматике. Фактическую ошибку может определить специалист в этой области.

The Deck Department of a MERCHANT ship have to perform a lot of  PRINCIPAL duties. In accordance with employment provisions they are RESPOSIBLE for operation and MAINTENANCE of all main and auxiliary MACHINERY equipment, control devices. It is necessary for EFFICIENT operation of a ship. PUMPMEN clean strainers to cargo pumps, lubricate, pack and adjust stems of cargo valves, repair them at first opportunity. While HANDLING cargo or bunkers they must (TO) ascertain that there is no LEAKING of oil OVERBOARD. They must ensure that oil in reduction gear IS renewed as specified in instructions and maintain and check all pumproom gauges for accuracy.