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11.2.2.1 — Monohulls Regeling veiligheid zeeschepen

Monohulls

.1 Curves of statical stability (GZ curves) for at least the Loaded Departure with 100% consumables and the Loaded Arrival with 10% consumables should be produced.

.2 The GZ curves required by .1 should have a positive range of not less than 90°.For vessels of more than 45m, a range of less than 90° may be considered but may be subject to agreed operational criteria.

.3 In addition to the requirements of .2, the angle of steady heel should be greater than 15 degrees (see figure). The angle of steady heel is obtained from the intersection of a ‘derived wind heeling lever’ curve with the GZ curve required by .1.

Noting that:

WLO= is the magnitude of the actual wind heeling lever at 0° which would cause the vessel to heel to the 'down flooding angle' θf or 60° whichever is least.

GZf = is the lever of the vessel's GZ at the down flooding angle (θf) or 60° whichever is least.

θd = is the angle at which the 'derived wind heeling' curve intersects the GZ curve. (If θd is less than 15° the vessel will be considered as having insufficient stability for the purpose of the Code).

θf = the 'down-flooding angle' is the angle of heel causing immersion of the lower edge of openings having an aggregate area, in square metres, greater than:-

All regularly used openings for access and for ventilation should be considered when determining the downflooding angle. No opening regardless of size which may lead to progressive flooding should be immersed at an angle of heel of less than 40°. Air pipes to tanks can, however, be disregarded.

If, as a result of immersion of openings in a superstructure, a vessel cannot meet the required standard, those superstructure openings may be ignored and the openings in the weather deck used instead to determine θf. In such cases the GZ curve should be derived without the benefit of the buoyancy of the superstructure.

It might be noted that provided the vessel complies with the requirements of 11.2.2.1.1, 11.2.2.1.2 and 11.2.2.1.3 and is sailed with an angle of heel which is no greater than the’ derived angle of heel', it should be capable of withstanding a wind gust equal to 1.4 times the actual wind velocity (i.e. twice the actual wind pressure) without immersing the’ down-flooding openings', or heeling to an angle greater than 60°.

Regeling
Regeling veiligheid zeeschepen
Soort
Ministeriële regeling
Geldend vanaf
01-07-2026
BWB-id
BWBR0017728
Versie
2026-07-01_0

In de hele regeling · Officiële tekst op wetten.overheid.nl