S-a-1330 — Shipwright/diver personnel 

This file documents the release of William Johnstone from naval duties to serve as chief shipwright and diver on the Niagara salvage operation. It includes records of his leave without pay, assessments of his fitness for duty, and assurances that his absence would not affect back pay, disability entitlements, or salary increments. The file contains correspondence with naval authorities, memoranda from the Chief Shipwright, and internal administrative annotations and approvals. Together, the records document the formal management of Johnstone’s employment status and illustrate the coordination required between naval and government authorities to facilitate specialist participation in the salvage effort.