law: Marine Insurance Act, 1963 
  47. Change of voyage
  (1) Where, after the
  
  commencement of the risk, the destination of the ship is voluntarily changed
  
  from the destination contemplated by the policy, there is said to be a change
  
  of voyage.
  (2) Unless the policy
  
  otherwise provides, where there is a change of voyage, the insurer is
  
  discharged from liability as from the time of change, that is to say, as from
  
  the time when the determination to change it is manifested; and it is
  
  immaterial that the ship may not in fact have left the course of voyage
  
  contemplated by the policy when the loss occurs.