Artikel 63

Galleys, bakeries, laundries, spaces occupied by drinking-water filtration or distilling plant, heating and ventilating units, pressurewater system (hydrophore), water-closets, privies, urinals etc. for the exclusive use of the master and crew shall be deducted, if such spaces have not been exempted from the gross tonnage, in accordance with the provisions of Article 57.
Pantries, hospitals, dispensary-rooms, medicine-lockers, spaces for linen, oilskin and dirty clothes, galley- and mess equipment, etc. used exclusively for the master and crew, may also be deducted.
Spaces properly constructed, strictly necessary and used for the storage of liquid and solid provisions exclusively for the master and crew, shall also be deducted. The deduction thus allowed shall, however, not exceed 15 per cent of the other deducted master's and crew spaces.
Food-lockers may be deducted without: any restriction in ships where the master and crew provide their own food, but no deduction for a provision-room shall be made in such cases.
Passage-ways and stairways exclusively serving as access for the master and crew to any exempted and/or deducted spaces, shall be deducted (see Figure 94). Such passage-ways and stairways shall also be deducted when they serve at the same time as access to:
a) Non-deductible spaces where the access to these spaces only consists of ordinary manholes (see Figure 95).
b) Non-deductible spaces exclusively appropriated for the use of the master and crew or a pilot.
c) Non-deductible passage-ways and stairways provided these are separately closed (see Figure 95).
A portion of a passage-way not bulkheaded off shall not be deducted.