Choose the option that correctly completes the blanks of the text below, respectively.

A fire occurred in the generator room ____ the vessel was at sea, depriving the vessel of all ____ emergency auxiliary power supplies. The crew fought the fire by using the vessel's fixed Halon installation and dry powder apparatus. ______ less than an hour the fire was extinguished. No injuries were experienced. ______ , due to the fire, the vessel lost her main propulsion power and had to be towed to port. (Casualty Information, 1997)