1230-007-512_E Vent System Upper Deck.pdf

This document is a technical schematic and specification sheet for a naval vessel system, specifically depicting the 3-KT Fleet Tug Ventilation Systems and Upper Deck Engine Room configuration produced by Marinette Marine Corporation.

The drawing contains comprehensive engineering details including system piping diagrams, ventilation layouts, material specifications, and performance tables. The upper portion displays detailed schematic diagrams showing ventilation system components, ductwork routing, and control mechanisms for the upper deck engine room area. Multiple tables list materials, quantities, and specifications for components including pipe sizes, fittings, and hardware required for fabrication. The document includes standard naval vessel drawing conventions with grid references, detail callouts, and cross-sectional views. The specification tables identify specific materials such as steel pipe, bronze fittings, and other marine-grade components with corresponding quantities and measurements. The right side contains notes regarding construction specifications, material standards, and installation requirements typical of naval engineering documentation. This appears to be a construction or procurement specification document that would guide fabrication and assembly of the ventilation system for this class of naval tug vessel.