ONBOARD PLANS are those considered
necessary as reference materials in the operation of a
ship. A shipbuilder furnishes a completed Navy ship
with copies of all plans needed to operate and maintain
the ship (onboard plans), and a ship’s plan index (SPI).
The SPI lists all plans that apply to the ship except
those for certain miscellaneous items covered by
standard or type plans. Onboard plans include only
those plans NAVSHIPS or the supervisor of ship
building consider necessary for shipboard reference.
The SPI is NOT a check list for the sole purpose of
getting a complete set of all plans.
When there is a need for other plans or additional
copies of onboard plans, you should get them from
your ship’s home yard or the concerned system
command. Chapter 9001 of the Naval Ships’
Technical Manual (NSTM) contains a guide for the
selection of onboard plans.
BLUEPRINT NUMBERING PLAN
In the current system, a complete plan number has
five parts: (1) size, (2) federal supply code
identification number, (3 and 4) a system command
number in two parts, and (5) a revision letter. The
following list explains each part.
1. The letter under the SIZE block in figure 1-1,
view A, shows the size of the blueprint according to a
table of format sizes in MIL-STD-100.
2. The federal supply code identification number
shows the design activity. Figure 1-1, view A, shows an
example under the block titled CODE IDENT NO
Figure 1-7.—Line characteristics and conventions for MIL-SDT drawings—Continued.
1-9
