Your vessel's drafts are: FWD 17'-05", AFT 20'-01"; and the KG is 25.6 feet. What is the righting moment when the vessel is inclined to 45°? (Use the reference material in Section 1, the blue pages, of the Stability Data Reference Book)

Correct Answer: Option B — 19,709 foot-tons

Righting moment equals displacement multiplied by the righting arm (GZ). Entering the Stability Data Reference Book with drafts yields displacement and cross curves of stability. Correcting for KG through GZ = KN - KG(sinθ) and multiplying by displacement gives 19,709 foot-tons.