The terms used in these guidelines have the same meaning
as those defined in the Convention. The following additional definitions
apply to these guidelines only.
2.1 "Adjacent space" means those spaces bordering
a space in all directions, including all points of contact, corners,
diagonals, decks, tank tops and bulkheads.
2.2 "Dangerous atmosphere" means an atmosphere
that may expose workers to the risk of death, incapacitation, impairment
of ability to self-rescue (i.e. to escape unaided from a space), injury
or acute illness.
2.3 "Enclosed space" means a space that has any
of the following characteristics:
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.1 limited openings for entry and exit;
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.2 inadequate ventilation; and/or
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.3 is not designed for continuous worker occupancy.
Enclosed spaces include, but are not limited to, cargo spaces,
double bottoms, fuel tanks, ballast tanks, cargo pump-rooms, cargo
compressor rooms, cofferdams, void spaces, duct keels, inter-barrier
spaces, boilers, engine crankcases, engine scavenge air receivers,
sewage tanks and adjacent connected spaces.
2.4 "Entry" means the action by which a person
passes through an opening into a space. Entry includes ensuing work
activities in that space and is considered to have occurred as soon
as any part of the entrant's body breaks the plane of an opening into
the space.
2.5 "Hot work" means any activity requiring the
use of electric arc or gas welding equipment, cutting burner equipment
or other forms of flame, as well as heating or spark-generating tools,
regardless of where it is carried out on board a ship.
2.6 "Space" means a permanent or temporary three-dimensional
structure or compartment on a ship such as, but not limited to, cargo
tanks or holds; pump or engine rooms; storage lockers; tanks containing
flammable or combustible liquids, gases, or solids; other rooms; crawl
spaces; tunnels (i.e. shaft alleys); or access ways. The atmosphere
within a space is the entire volume within its bounds.