There will be two well-protected and arranged lookout stations aloft; one on each side of the mast as high as possible, capable of holding four lookouts each. There will be four well-protected and arranged lookout stations on each side of the ship, capable of holding two lookouts each. During daylight there will be an officer in each top, in addition to lookouts. At all times there will be an officer in charge of lookouts on deck who will make periodic inspections. The communication system from lookout stations to bridge will be tested frequently. Lookouts will be carefully selected for their fitness for lookout duty—keen eyesight, intelligence, and freedom from seasickness are essential qualities. A school for lookouts will be held daily. They will be instructed to report everything they see. In so far as practicable they will be furnished with binoculars and each lookout will always use the same glass. Each lookout will be assigned a definite sector and will be required to maintain the closest possible watch within that sector, no matter what may be happening in other sectors. Gun crews will be at all times in the immediate vicinity of their guns. One man of each crew will be at all times on watch. Daily pointing, loading, and fire control drills will be held. When conditions permit and upon orders from the Group Convoy Commander, target practice will be held in accordance with the General Signal Book. No radio message will be sent except in great emergency involving the safety of the ship. A continuous radio watch will be maintained. If it becomes necessary to communicate by radio, the cipher contained in the operation order will be used. All vessels will be darkened so that no ray of light shall show outboard between sunset and sunrise. A single gleam of light may cause the loss of the ship. Sentries will make constant rounds to insure the strict enforcement of this order throughout the ship. Navigational lights will not be shown except when specifically ordered by the convoy commander or when immediately necessary to avoid collision and then only long enough to meet the emergency. Range lights will not be shown and all lights will be dimmed to two miles visibility. Smoke from the funnels must be reduced to a minimum both by day and night. All vessels will keep fuel so trimmed that maximum speed can be maintained toward end of voyage. Neither the whistle or the siren shall be used in submarine waters except in case of emergency. Care will be exercised that the leads of the siren and whistle cords are such that these cannot be accidentally pulled or become jammed. A station bill will be prepared showing the stations at fire quarters and abandon ship. Daily drills at fire stations and abandon ship will be held until all persons on board become familiar with their duties.