Figure 13-23.—General profile appearance of submarines.
Other appearance types with rectangular sails
comprise groups 3, 4, and 5 (fig. 13-25). In these
groups, hull features such as stern and bow type are
the differentiating factors.
appearance of the sail is rectangular, but the topline is
broken with mirror knuckles, protuberances, and fixed
or semiretractable equipment. If a small step occurs,
it measures less than one-fifth of the sail height and
Appearance group 6 includes a small group of
usually indicates a shield, a raised well cover, or a
transitory types of design. In this group, the overall
fixed snorkel exhaust casing. Generally speaking, this
13-17
