For the purposes of this part—

1. (a) Position 1 means in an exposed position on—

   1. (1) The freeboard deck or a raised quarter deck;
   2. (2) A superstructure deck or a trunk deck and forward of a point 1/4 L from the forward perpendicular; or
   3. (3) A trunk deck whose height is less than Hs.

2. (b) Position 2 means—

   1. (1) On a superstructure deck aft of a point 1/4 L abaft the forward perpendicular; or
   2. (2) On a superstructure and trunk combination, that is Hs or more n height, aft or a point 1/4 L abaft the forward perpendicular.