ROPOS ("Remotely Operated Platform for Ocean Science") is an ROV used primarily for scientific research.
It was originally built in Vancouver by International Submarine Engineering[1] and purchased by the Canadian federal government.
The same government program also operated the Pisces IV crewed submersible, now in Hawaii being run by the Hawai'i Undersea Research Laboratory (HURL)[2] who found the long-lost two-man Japanese sub which heralded the attack on Pearl Harbor.
The funding for the Canadian submersible program eventually dried up, but by that time the user group had been established and long term experiments put in place on the sea floor.
ROPOS also has "plug and play" equipment; A hot fluid sampler (HFS) at about 200 pounds (90 kg) and requires 120 V AC and a data line to function, and a number of different hydraulic functions which are available for scientific equipment, similar to the Woods Hole vehicles Jason and Jason 2.