Draft Survey · Knowledge Note
What Is TPC in a Draft Survey?
TPC is the weight needed to change a vessel's mean draft by one centimetre. What it means, how it is derived, and where the figure is used on board.
Library
Knowledge
The technical knowledge library — concepts, terms and comparisons.
Draft Survey
Subject index →Draft Survey · Explainer
Trim Correction in a Draft Survey: First, Second and the Sign Errors
Why a draft survey needs two trim corrections, how each one is calculated, and how a sign convention applied the wrong way quietly moves the cargo figure.