Is the agreed tank venting system being used?
Agreement should be reached, and recorded, as to the venting system for the operation, taking into account the nature of the cargo and international, national or local regulations and agreements.
There are three basic systems for venting tanks:
1. Open to atmosphere via open ullage ports, protected by suitable flame screens.
2. Fixed venting systems which includes inert gas systems.
3. To shore through other vapour collection systems.
Have the p/v vents been operated using the checklift facility and the operation of the vent verified?
The operation of the p/v vents should be checked using the facility provided by the manufacturer. Furthermore it is imperative that an adequate visual, or otherwise, check is carried at this time to ensure the checklift facility is actually operating the valve. On occasions, a seized or stiff p/v vent has caused the checklift drive pin to shear and the ship's personnel to assume, with disastrous consequences, that the vent was operational.
Are hand torches of an approved type? and,
Are portable VHF/UHF transceivers of an approved type?
Battery operated hand torches and VHF radio-telephone sets should be of a safe type which is approved by a competent authority. Ship/shore telephones should comply with the requirements for explosion-proof construction, except when placed in a safe space in the accommodation.
VHF radio-telephone sets may operate in the internationally agreed wave bands only.
The above mentioned equipment should be well maintained. Damaged units, even though they may be capable of operation, should not be used.
Are the ship's main radio transmitter aerials earthed and radars switched off?
The ship's main radio station should not be used during the ship's stay in port, except for receiving purposes. The main transmitting aerials should be disconnected and earthed.
Satellite communications equipment may be used normally unless advised otherwise.
The ship's radar installation should not be used unless the master, in consultation with the terminal manager, has established the conditions under which the installation may be used safely.
Are electric cables to portable electrical equipment disconnected from power?
The use of portable electrical equipment on wandering leads should be prohibited in hazardous zones during cargo operations and the equipment preferably removed from the hazardous zone.
Telephone cables in use in the ship/shore communication system should preferably be routed outside the hazardous zone. Wherever this is not feasible, the cable should be so positioned and protected that no danger arises from its use.
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Are all external doors and ports in the accommodation closed?
External doors, windows and portholes in the accommodation should be closed during cargo operations. These doors should be clearly marked as being required to be closed during such operations, but at no time should they be locked.
Are window type air conditioning units disconnected? and,
Are air conditioning intakes which may permit the entry of cargo vapours closed?
Window type air conditioning units should be disconnected from their power supply.
Air conditioning and ventilator intakes which are likely to draw in air from the cargo area should be closed.
Air conditioning units which are located wholly within the accommodation and which do not draw in air from the outside may remain in operation.
Are the requirements for the use of galley equipment and other cooking appliances being observed?
Open fire systems may be used in galleys whose construction, location and ventilation system provides protection against entry of flammable gases.
In cases where the galley does not comply with the above, open fire may be used provided the master, in consultation and agreement with the terminal representative, has ensured that precautions have been taken against the entry and accumulation of flammable gases.
On ships with stern discharge lines which are in use, open fire in galley equipment should not be allowed unless the ship is constructed to permit the use of open fire in such circumstances.
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