1. 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

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

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

4. U. S. Naval Sea Cadet CorpsCOMPASS :: http://compass.seacadets.org/ 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

5. U. S. Naval Sea Cadet CorpsCOMPASS :: http://compass.seacadets.org/ 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 Captain's battle circuit JC Ordnance Control JF Flag officer 1JG Aircraft control JL Battle lookouts 2JC Dual-purpose battery control 1JS Sonar control 1JV Maneuvering, docking, and catapult control JW Ship control rangefinders JX Radio and signals JZ Damage control

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

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