it s angle between horizontal plane and slope obtained when bulk cargo loaded on this plane.
MARPOL annex-II requires all ships to carry a P&A manual - Procedures and Arrangements manual containing procedures with respect to cargo handling, tank cleaning, stop handling, residue discharge, ballasting and deballasting.
2 all round light.upper is red and lower white in vertical line
if making way side light and asern light
and out laying extsnding more than 150 m in horizontal direction all round white light toward the gear