A vessel's tropical load line is 6 in. above her summer load line. Her TPI is 127 tons. She will arrive in the summer zone 8 days after departure. She will burn off about 47 tons/day fuel and water consumption is 12 tons/day. How many tons may she load above her summer load line if she loads in the tropical zone?

Correct Answer: Option A — 472

Compute allowable tropical zone loading by combining the seasonal load line differential with anticipated voyage consumption. The 6-inch TPI difference plus 8 days of total consumption (59 tons/day) converted via TPI determines the maximum deadweight excess permitted above the summer load line.