Woods Hole Cinematographer Evan Kovacs has dived Titanic's sister ship, HMHS Britannic, on two expeditions. Despite extensive prior preparation and planning neither expedition ran as it was meant to. The added complication on both expeditions was that at the end of it there needed to be enough material for a unique television programme. Evan reveals what it is like to dive this Olympic Class liner and gives a unique behind the scenes glimpse of what it is like to work on National Geographic Documentaries.