Hi Jeromephone
Thanks for the reply, I didn't want to complicate things with to much detail though I realise I probably need to offer more detail to help with replies.
The camera is going to be viewing equipment towed at sea, the equipment is supplied by a large umbilical which has the 19AWG twisted pair going through it which is all I have to utilise, there is a fibreoptic cable which has not been terminated and in installments in the future I intend to ask for this to be terminated to use this method, but before that I need to prove the concept of having the cameras on the equipment working and producing a decent image of the equipment.
The umbilical is on a large winch which is why I need the Ethernet cable to wire into a junction box, to the umbilical. We can supply power down the umbilical separately if needed. This is why if these cables cant be used I will probably have to start looking at a wireless connection (equipment is 130m behind the vessel) but would rather have as least equipment as possible towed at sea (the less there is at sea the less that could go wrong)