🔍 Key Concepts

• displacement and draft relationship for this specific vessel (use the hydrostatic/displacement table provided in exam references) • how to use tons per inch immersion (TPI) or the draft-displacement curve near 58.0 feet • difference between adding ballast (weight on) vs. removing weight (lightening) and what that does to draft

💭 Think About

• First, find the vessel’s displacement at 58.0 feet draft from the hydrostatic table. Then determine how much the draft changes when you increase the displacement by 68.94 long tons. • Ask yourself: near 58.0 feet, how many long tons are required per foot (or per inch) of change in draft for this vessel? Use that to convert 68.94 long tons to a change in draft. • Finally, decide if the draft should increase or decrease when ballast is added, and apply that change to the original 58.0 feet draft.

✅ Before You Answer

• Verify you are using long tons (2,240 lb) if any conversion is required, consistent with the hydrostatic data units. • Confirm you are reading the correct draft column (not freeboard, not mean of fore and aft unless the problem specifically requires it). • Double-check the direction of draft change: adding weight/ballast makes the vessel sink deeper, so the numerical draft should move in the correct direction before you pick an answer.