When making a turn (course change) on most merchant ships, the vessel will heel outwards if __________.
• Transverse stability and the position of the ship’s center of gravity (G) • How a ship normally heels inwards toward the center of a turn when stability is good • The relationship between center of gravity (G) and center of lateral resistance (underwater pivot/turning center)
• Think about what happens to the ship’s weight and buoyancy forces when she turns: which side tends to go down in a normal, stable turn? • Ask yourself: in what relative position of G and the turning/pivot point would the ship’s hull tend to swing outward instead of leaning into the turn? • Which options (draft vs. relative position of G and lateral resistance) directly affect the direction of heel in a turn, not just how ‘heavy’ or ‘light’ the ship is?
• Identify which choices describe geometric relationships of forces (G vs. center of lateral resistance) rather than just loading condition (deep vs. little draft). • Recall that outward heel in a turn is associated with a less favorable or unusual stability condition compared with the normal inward heel. • Before selecting, mentally sketch the ship in plan view and side view and mark G and the center of lateral resistance; ask: if G is higher or lower than that point, which way would the ship tend to heel when turning?
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