Article 3
In Rule 33(1) of the principal Rules the following definitions shall be inserted in the appropriate alphabetical order:
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“column stabilised” means, in relation to a unit, constructed with the main deck of the unit connected to its underwater hull or footings by columns or caissons;
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“mobile offshore drilling unit” means a ship capable of engaging in drilling operations for the exploration or exploitation of resources beneath the sea bed such as liquid or gaseous hydrocarbons, sulphur or salt;
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“mobile offshore support unit” means a ship used in connection with the offshore petroleum industry to provide ancillary services such, as accommodation, cranes or repair facilities.