Why go to sea without HF, Sat, etc? ...it was in the moviescript. Hard to build the drama when the star has all the gizmos to avoid disaster. The setup can work if the sailor (Redford) is cast as a old-school stubborn bonehead that would do just such a thing. If not I'll try to think he is. I remember a old pilot that wouldn't put a radio in his Piper Cub... said "you find me a radio that'll provide lift and I'll install it". Just sayin' stubborn old sailors (et. al.) are out there.
Perhaps it would be best if we just wait until we actually see the film, no? :-)
Plot Summary for
All Is Lost (2013)
Deep into a solo voyage in the Indian Ocean, an unnamed man (Redford) wakes to find his 39-foot yacht taking on water after a collision with a shipping container left floating on the high seas. With his navigation equipment and radio disabled, the man sails unknowingly into the path of a violent storm. Despite his success in patching the breached hull, his mariner's intuition and a strength that belies his age, the man barely survives the tempest. Using only a sextant and nautical maps to chart his progress, he is forced to rely on ocean currents to carry him into a shipping lane in hopes of hailing a passing vessel. But with the sun unrelenting, sharks circling and his meager supplies dwindling, the ever-resourceful sailor soon finds himself staring his mortality in the face.