NSCC SEAMAN MODULE TWO INTERIOR COMMUNICATIONS By ENS

NSCC SEAMAN MODULE TWO INTERIOR COMMUNICATIONS By ENS MATTHEW LANDRY, NSCC USS JOSEPH P KENNEDY, JR (DD 850) DIVISION FOR USE WITH CHAPTER 2, PAGES 2 -15 TO 2 -19 OF NAVEDTRA 14067

Enabling Objectives • Define the purpose and use of the various interior communications systems COMPASS : : http: //compass. seacadets. org/ U. S. Naval Sea Cadet Corps

Service Telephone System • • Similar to dial telephone ashore Electrically powered Central switchboard Can be connected while in-port for outside calls COMPASS : : http: //compass. seacadets. org/ U. S. Naval Sea Cadet Corps

Sound-powered Telephone System • Sound-powered – Instead of a battery, your voice provides the power – Failure of the electrical system has no bearing on the phones • Primary battle telephone circuits – Means of communication between selected battle stations on a circuit – No dialing is necessary COMPASS : : http: //compass. seacadets. org/ U. S. Naval Sea Cadet Corps

Sound-powered Circuits • Always begin with “J” • Second letter is a subdivision of the circuit • All major circuits have an outlet on the bridge! Example: Common circuits JA JC JF 1 JG JL 2 JC 1 JS 1 JV JW JX JZ COMPASS : : http: //compass. seacadets. org/ Captain's battle circuit Ordnance Control Flag officer Aircraft control Battle lookouts Dual-purpose battery control Sonar control Maneuvering, docking, and catapult control Ship control rangefinders Radio and signals Damage control U. S. Naval Sea Cadet Corps

Shipboard Announcing Systems • 1 MC: General announcing circuit, word passed throughout the ship • Contains switches to cut out certain parts of the ship • Other one-way announcement circuits – 2 MC: Engineering – 3 MC: Hangar deck – 6 MC: Intership (bullhorn) COMPASS : : http: //compass. seacadets. org/ U. S. Naval Sea Cadet Corps

“Squawk Boxes” • Two-way communication • Electrically powered • Raises noise level in the space • Not used when phones manned COMPASS : : http: //compass. seacadets. org/ U. S. Naval Sea Cadet Corps