Expired / Safety: In order to calculate the TPI of a vessel, for any given draft, it is necessary...

Sh Shawn · Sep 3, 2015 7:44am

TPI: Tons Per Inch Immersion
AWP: Area of Water Plane
420: Is the number that is equal to 12" * 35 FT^3/Ton of salt water.

TPI = AWP / 420

Helping mariners pass their U.S. Coast Guard license exams since 2008 with 48,213+ real exam questions, practice exams, and progress tracking.

USCGQ.com is an independent study aid and is not affiliated with the U.S. Coast Guard.

Privacy Terms Disclaimer Site map