the will to survive. something the families of these two missing boys are sure they have too. cnn, jupiter, florida. >> and a lot of experience on the water as well. joining me, the cargo ship captain. captain, the coast guard officials say people can survive in these waters this time of year for about four or five days. do you think that is still possible? >> reporter: absolutely. we still want to be optimistic that these 14-year-olds are still alive today. absolutely they can probably stay four or five days. so long as they have some time of flotation device that will help them stay afloat. >> that's critical. even in 80-degree water, you can still get hypothermia over time. >> absolutely. we're looking, every day they're losing their body heat. they're using a lot of their body heat. if they know any survival tactics like to get into a fetal position or huddling together,