Definition(s)
Pontoon
Pontoon is considered to be normally:
1 non self-propelled;
2 unmanned;
3 carrying only deck cargo;
4 having a block coefficient of 0.9 or greater;
5 having a breadth/depth ratio of greater than 3; and
6 having no hatchways in the deck except small manholes closed with gasketed covers.
Source: IMO resolution MSC.267(85), International Code on Intact Stability, 2008 (2008 IS Code), 4 December 2008, International Maritime Organization. Regulatory Guidance
Source: IMO Resolution MSC.267(85), adoption of the International Code on Intact Stability, 2008 (2008 IS Code), 4 December 2008, International Maritime Organization. Regulatory Guidance