List vs Loll
List = heel from asymmetric weight distribution (positive GM). Loll = heel from negative GM with the ship oscillating about an angle either side of upright.
In practice
Master diagnosis on first sign: list responds to weight redistribution; loll requires GM increase first (low ballast, removed top weight). Misdiagnosis can capsize a vessel with negative GM.
Regulatory detail & full definition
Distinct phenomena in stability practice. List is heel from asymmetric weight distribution acting on a positive-GM ship — the vessel sits steadily at the heel angle and returns to that angle when disturbed. Angle of loll arises when the ship has negative GM and oscillates about an angle of either side of upright at which positive righting first emerges. The corrective actions differ: list is corrected by shifting weight to the high side; loll is corrected first by improving GM (filling low tanks symmetrically, removing top weight) before considering weight transfer.
Related
Source: Standard naval architecture
High confidence
Editorial confidence: how we grade.