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: niet aa Hs thd of The In- ernationa onfer Life at Sea. ence on Safety of Lights on the master control banel board flash the position of each bulkhead door—open, clos- 3 or shut—to the officer in the bilot house. Below is a view of a Bulkhead Door Control Unit in- stalled on board the S. S. Cali- Like a ‘Bulkhead Watch’ that never goes Off Duty ~wectallities.. Be certain your motor control is built for sea service Rough weather... the roll and pitch of the vessel—sleet, rain and salt atmosphere— all these trying conditions of Service can only be met by motor control built for the sea. The standard line of utler-Hammer Marine Motor Control is the result of three decades o shipboard experience—building control especially for marine uses. ordinary requirements are met by the standard C-H i Write for full informa- HEN your bulkhead doors are un- der the alert, responsive control of Cutler-Hammer Bulkhead Door Operat- ing System you have a “bulkhead watch” that never goes off duty. Day and night a high starting torque motor stands guard at each opening, ready—at the flip of a switch in the pilot house—to close or open the door within seconds. Far faster than by hand. And far more safely. For the C-H System operates all doors simul- taneously .. . or separately, if required. You can isolate an entire section of the ship as quickly as you can close a single door. The C-H Motor-Driven System is sim- ple. There is a master control panel located in the pilot house which has con- stant control of every door. At each opening there are two local control sta- tions. These operate in- dependently of the master control. But... and this is important . . . manual or local operation of bulk- head doors is never interfered with, 'The C-H: System is fool-proof. Naval architects and shipbuilders co- operated with Cutler-Hammer ship engi- neers in the design of this system... the first to be installed on a U. S. vessel. It goes readily into new or rebuilt ships. It meets all naval specifications. Builders of yachts, diesels and steamships should read “Modern Watertight Door Control.” Your copy of this new Cutler-Hammer bookletis free. CUTLER-HAMMER, Inc., Pioneer Manufacturers of Electric Control Apparatus, 1322 St. Paul Avenue, Mil- waukee, Wisconsin. MARINE REVIEW—May, 1931 AMMER fornia of the Panama-Pacific WATERTIGHT DOOR jj CONTROL } 65