This document specifies methods for evaluating the stability and buoyancy of intact (i.e. undamaged) boats. The flotation characteristics of boats susceptible to swamping are also encompassed.
The evaluation of stability and buoyancy properties using this document will enable the boat to be assigned to a design category (A, B, C or D) appropriate to its design and maximum total load.
This document is principally applicable to boats propelled by human or mechanical power of 6 m up to 24 m hull length. However, it can also be applied to boats of under 6 m if they do not attain the desired design category specified in ‑ and they are decked and have quick-draining recesses which comply with .
In relation to habitable multihulls, this document includes assessment of susceptibility to inversion, definition of viable means of escape and requirements for inverted flotation.
This document excludes:
— inflatable and rigid-inflatable boats covered by the , except for references made in the to specific clauses of the ;
— personal watercraft covered by and other similar powered craft;
— gondolas and pedalos;
— sailing surfboards;
— surfboards, including powered surfboards;
— hydrofoils and hovercraft when not operating in the displacement mode; and
NOTE Displacement mode means that the boat is only supported by hydrostatic forces.
It does not include or evaluate the effects on stability of towing, fishing, dredging or lifting operations, which need to be separately considered if appropriate.
Status: PublishedPublication date: 2022-12
Edition: 4Number of pages: 76
Technical Committee: ISO/TC 188 Small craft
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