TM 55-607/NAVSEA OP 3221 Rev 2
Figure 6-4. Dynamic forces due to roll motion.
c. The pitch motion produces acceleration forces that are significant
in the vertical direction only. These forces can
also have components that act across the deck, when the ship is rolled away from the vertical, thereby supplementing the
roll forces. The main effects of pitching on securing structures are illustrated in figure 6-5.