There’s a whole glorious mine of nerdy information on submarine cables available. I am a mild nerd in this area, due to my interest in my home county of Cornwall, where many submarine cables come ashore. Steven Heaton’s site is a wonderful source of information on this subject. He recently linked to the Kingfisher bulletins which fortnightly report hazards to fishing, including exposed subsea cables. There’s a whole archive going back three years! I don’t think I’ll look through all of that archive….
Another superb resource on this subject is the Flickr photostream of Global Marine Photos which has many images of marine cable laying, including the one above of the cable layer ship CS Sovereign.
Photo by Global Marine Photos
Liberal Burblings 
The SmartPlug Marine cordset comes with a cool blue LED Power indicator light that glows when power is on. The cordset is available in a 25′ & 50’ lengths with the SmartPlug connector with a weatherproof seal for the boat side and the industry standard three pin twist-type connector for the marina power pedestal. SmartPlug marine cords have tinned wire to minimize corrosion.
Marine cordset