DEPARTMENT OF THE NAVY
OFFICE OF THE CHIEF OF NAVAL OPERATIONS
2000 NAVY PENTAGON
WASHINGTON DC 20350-2000
OPNAVINST 4442.1H
N41
20 Nov 2017
OPNAV INSTRUCTION 4442.1H
From: Chief of Naval Operations
Subj: STOWAGE AND SPACE REQUIREMENTS FOR NEW CONSTRUCTION AND
MAJOR CONVERSIONS OF SHIPS
1. Purpose
a. To set forth criteria governing shipboard stowage space requirements for supply support
material.
b. Major changes to this instruction include updates to the ship type and type designations.
This instruction is a complete revision and should be reviewed in its entirety.
2. Cancellation. OPNAVINST 4442.1G.
3. Scope and Applicability. The requirements addressed in this directive apply to stowage
spaces for self-support and have been expanded to include: equipment-related repair parts and
consumables (including classified repair parts), other consumables, hazardous materials
(HAZMAT), medical stores, ship store stocks, and provisions (including frozen, chilled, and dry).
These requirements do not apply to bulk fuel or ammunition stowage spaces.
4. Policy
a. The endurance goals in table 1 reflect stockage objectives (i.e., the operating levels of
stock, plus a factor of safety), which represent the desired quantity of material (in days of supply)
each platform type should be capable of storing on board in order to sustain operations. The size
of shipboard storerooms for designated categories of material will be adequate to stow this
quantity of material. These endurance goals are derived from fleet operating requirements and
logistics support plans, and should shape planning efforts for supply and medical materiel
stowage in new construction and major conversion of ships entering the preliminary design
phase after the date of final approval of this instruction.
