This document provides a technical overview of the Fleet Type Submarine as of June 1946, detailing its design, capabilities, and operational considerations for naval personnel. Compiled by the Standards & Curriculum Division Training, it serves as a restricted reference for understanding this critical naval asset during the post-World War II era.

This manual is a primary source document for understanding naval technology and operations in the mid-20th century. Its restricted nature suggests it was intended for official use, offering detailed, technical information rather than a general historical narrative. The content likely appeals to naval historians, military technology enthusiasts, and researchers focused on submarine warfare during and immediately after World War II.