M286-243-FM01-03(Shaft Arrangement).pdf

This is a technical drawing document for a RAFT (Rapid All-Terrain Flotation) vessel produced by VT Halter Marine, Inc. in partnership with Vision Technologies Systems. The document is marked "REV. 2 NOT ISSUED DUE TO CONTRACT TERMINATION" and contains comprehensive engineering specifications for a coastal mapping vessel designated as the NOAA SWATH (Small Waterplane Area Twin Hull) vessel.

The drawing set includes detailed mechanical and engineering specifications covering the shaft arrangement diagram, propeller systems, hull configurations, and structural details across 40 pages. Key systems documented include: propeller data and specifications (propeller hub, seal ring, and nut locking screws); shaft coupling and line shaft arrangements operating at 2,300 RPM; main engine specifications with reduction gear mounting; pedestal bearing installations; and comprehensive dimensional drawings with tolerances. The document details structural components including foundation plates, bulkhead seal mountings, end-of-shaft details, and various mechanical assemblies. Multiple details are provided for propeller nut locking mechanisms, shaft bearings, and coupling arrangements. The vessel specifications indicate an estimated gross tonnage of approximately 8,560 to 8,863 tons with specific propulsion and maneuverability requirements. This appears to be a government contract vessel design document for NOAA's coastal mapping capabilities, though the contract termination status indicates the project was not completed.