 At Sembuwan Camp in the Republic of Singapore, Marines and U.S. sailors from the Third Reconnaissance Battalion mingle with their counterparts from the Republic of Singapore's Naval Diving Unit. They're taking part in Sand Fisher 12, the bilateral amphibious reconnaissance training exercise. After a briefing, they carry on with today's first objective, by taking to the water. Courtesy of Sembuwan Camp's Sea Circuit course, designed to condition its divers physically and mentally. It's everything. No matter how much you know, if you're not in shape well enough to move around and carry your weight and potentially your buddy's weight, you're nothing. So you can know everything, but if you can't move weight and you can't keep going for long periods of time, then you're worthless. And with another lap of the Sea Circuit course, the training of Sand Fisher 12 continues. Ready Officer Justin Whiteman, Sembuwan Camp Republic of Singapore.