For the purpose of the Regulations, two positions of hatchways,
doorways and ventilators are defined as follows:
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Position 1 - Upon exposed freeboard and raised quarter decks,
and upon exposed superstructure decks situated forward of a point
located a quarter of the ship's length from the forward perpendicular.
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Position 2 - Upon exposed superstructure decks situated
abaft a quarter of the ship's length from the forward perpendicular.