1. NS100 Ship Characteristics

4. Ship Structure Definitions Hull - The main body of the ship. Shell Plating - The sides of the hull. Bilge - Intersection of side plating and bottom plating. Keel - Backbone of the ship.

6. Ship Structure Definitions Frames - Fastened to the keel, running athwartships. Support the skin. Main Deck - Uppermost continuous deck from bow to stern. Levels - Similar to decks, located above the main deck.

7. Ship Structure Definitions Decks - “Floors” aboard ship. Bulkheads - “Walls”. Overheads - “Ceilings”. Compartments - “Rooms”. Bounded by overheads, bulkheads and decks.

10. Hull Reference Terms Ballast - Weight added to lower part of ship to help keep her in balance. Either permanent or controllable (ballast tanks). Propeller guards

11. Compartment and Deck Numbering Every compartment aboard a ship is given an identifying alphanumeric symbol which is marked on a label plate on or near the entrance. For example: 3-75-4-M

14. Compartment Numbering E - engineering DC – damage control F - fuel J- JP5 C - ship control (bridge,CIC) L - living spaces M - ammunition spaces Q - spaces not otherwise designated V - voids

17. Shipboard Compartmentation and Watertight Integrity A ship’s structure is divided into many watertight compartments in order to maximize damage control readiness.

18. Material Conditions of Readiness X-ray - Least protective condition Yoke - at sea and in port after working hours Zebra - General Quarters. Circle X-ray, Circle Yoke, Circle Zebra -closed when not in use. Dog Zebra - Zebra, also secured during “darken ship” condition. William - open. Maintenance and system isolation.

19. secured – Condition X-ray secured – Condition Yoke secured – Condition Zebra closed when not in use

20. secured - “darken ship” condition always open secured - Chemical, Biological, and Radiological (CBR) attack.

21. Material Conditions of Readiness Circle William - Normally kept open, secured for protection against Chemical, Biological, and Radiological (CBR) attack.

22. Review Questions 1. What is the difference between a deck and a level? 2. What is the number of the main deck? 3. When is material condition Yoke set throughout the ship? 4. Besides general quarters, when is material condition Zebra set throughout the ship? 5. What do Circle William fittings protect against?

23. Review Questions 6. What are Dog Zebra fittings designed to do? 7. What is the difference between list and trim? 8. If you were told, “Ensign, go to compartment 6-132-0-E to get a HT ( USN - Hull Maintenance Technician ) punch,” where would you go?