If mechanical

F.5.2 If mechanical or natural ventilation is required the ducting is to be arranged such that the
space above the cargo can be ventilated and that exchange of air from outside to inside the entire cargo
space is provided. The position of air inlets and air outlets shall be such as to prevent short circuiting of
the air. Interconnection of the hold atmosphere with other spaces is not permitted.
F.5.3 If mechanical ventilation required portable fans may be used instead of fixed ones. If so, suitable
arrangements for securing the fans safely are to be provided. Electrical connections are to be fixed
and expertly laid for the duration of the installation. Details are to be submitted for approval.
F.5.4 If continuous ventilation is required a ventilation system which incorporates at least two powered
fans with a capacity of at least three air changes per hour each based on the empty cargo hold is to
be provided. The ventilation openings shall comply with the requirements of the Load Line Convention, for
openings not fitted with means of closure. According to ICLL, Regulation 19(3) the openings shall be
arranged at least 4.50 m above deck in position 1 and at least 2.30 m above deck in position 2.