Pay all sums for which the insured shall become legally liable as compensation
for physical loss or destruction of or damage to goods or merchandise ... while
in transit ... including during loading or unloading and while temporarily
housed on or off vehicles in the ordinary course of transit.
The cover will commence with the loading of cargo on the vehicle and will be in
force until unloading of the cargo at the discharging point or expiry of 7 days
after the first arrival of the vehicle at the destination town whichever may
first occur.