437-6634704 Tank Level Indicating Sys EWD - redline.pdf

This is a technical drawing package and elementary wiring diagram for a Tank Level Indicating System (TLIS) for Coastal Hydrographic Survey Ships.

The document is a 23-sheet engineering drawing set produced for the Department of the Navy, Naval Sea Systems Command, Washington, D.C. under Contract N00024-92-C-2019 with Halter Marine Inc. The drawings were created by A Trinity Industries Co. and bear drawing number 6634704. The system provides tank level indication and control capabilities across multiple tank types aboard naval vessels, including ballast tanks, fuel oil tanks, sewage tanks, and potable water tanks. The parts list specifies steel and brass components including a tank level control panel (1 unit), analog gauge panels (3 units), pressure transducers, terminal boxes with varying terminal counts (10, 20, and 40 terminals), swage stuffing tubes, and low-smoke cable assemblies per MIL-C-24643 specifications. The terminal boxes (designated C-ITK1 through C-ITK10) are distributed across multiple ship locations including machinery spaces, engine rooms, steering gear rooms, ballast manifolds, and fuel manifold stations. The elementary wiring diagrams detail electrical interconnections between transducers, terminal boxes, and control panels using color-coded conductors (Red, White, Black, Blue, Green, Orange, Brown) with multiple spare conductors provisioned throughout. Installation requirements reference structural, piping, duct, and arrangement drawings, with field verification of tank level switch locations and cable routing requirements mandated per United States Coast Guard and American Bureau of Shipping standards.