MIL-HDBK-2189 (SH) SECTION 243-1, DOD MILITARY HANDBOOK DESIGN METHODS FOR NAVAL SHIPBOARD SYSTEMS SECTION 243-1 PART 1 PROPULSION SHAFTING (30 AUG 1994) [SUPERSEDING MIL-STD-2189-243-1]., This document applies to the propulsion shafting design of all naval ships, surface and submarine, single- or multiple-shaft. NOTE: MIL-STD-2189-243-1 has been redesignated as a handbook, and is to be used for guidance only. This document is no longer to be cited as a requirement. For administrative expediency, the only physical change from MIL-STD-2189-243-1 is this cover page. If cited as a requirement, contractors may disregard the requirements of this document and interpret its contents only as guidance.