I travel, we keep the boat behind the house most of the time. Sometimes at the Marina. I could not get wife to check on boat while I was on the road for a week at a time. The 8 year old would text me, 10 minutes before I got back home, that Mom had just gone down and checked the boat... So I installed a DVR with a wireless link to my house for when its at the house, and it defaults over to a Cellular modem (6.00 per month) when its away from home. Kind of nice, even when i am 2 miles away on the beach, if i have my cell, i can see the 4 cameras currently installed. Its a 8 channel system, and the other 4 cameras are on the list... You can see on the one picture, that is the water level in the lower bilge... I did find it one time at the top, which is only about 40 gallons of water, due to a smoked Rule53s pump. I also have high water alarms, but this is one of those, SHOW ME, type of solutions. Its also nice to check the bilge from the upper helm, and at night from the rear stateroom! I have about 300 in the DVR/cameras, and another 200 in the network equipment, plus 12 to 14 hours to set it all up.