may be affected by weather or other condition changes , such as shallow water approach, concentration of marine life or seaweed, ice in water ,or change of trim or draft due to ballasting shifting.РOne hour before inert gas system operation is required (for tanker)РOne hour before steam is required on deckРWhenever the temperature fall to 2 degree centigrade to prevent damage to equipmentРAt least one hour before the standby generator is requiredРWhenever the cargo pumps are usedРOne hour prior to getting underwayР24.what should you do first after you jion a vessel?РFirstly, I shall familiarize myself with the familisrization booklet, the muster lists and emergency card in my cabin.РSecondly , I shall report to the master and get familiar with other officers and crew on board the vessel .