Nova Ray / VideoRay - News - October
Coast Guard Successfully
Test's MicroWing Conversion Kit For VideoRay®
Installing the Nova Ray® performance
MicroWing was easy and quick. It took the place
of the existing VideoRay® float. The vertical
thruster propeller was exchanged with a worm drive
that operated the elevator on the back of the
Nova Ray® MicroWing. The MicroWing provided
almost 2 lbs of buoyancy more than the VideoRay
float so more lead was needed to keep the ROV
Our first test, we towed the VideoRay®
ROV with the Nova Ray® MicroWing in Lake Washington
to simulate a 3 to 4 knott current. The ROV was
stable and was able to be towed between 35ft (with
50ft of cable) and 95ft (with 230ft of cable).
Under its own power it was able to descend deeper.
While being towed, the ROV was able to travel
up to 20 degrees off of the boats heading before
returning to the boats original heading. The ROV
maintained a smooth and stable ride.
Under its own power, the ROV with
the Nova Ray® MicroWing provided a smooth
and stable video. It was difficult to maintain
a constant depth unless it was moving forward.
The vertical thruster propeller was removed to
operate the elevator. Therefore forward motion
or a current is needed to dive, rise or maintain
depth. We then took a road trip down to Portland
Oregon to attempt a river trial in the Willamette
River where we conduct normal ROV operations each
year. Due to a high tide and lack of rain fall
the river was not running at a current fast enough
to utilize the MicroWing properly but we believe
that had the current been greater we feel the
outcome would have given us tool that would greatly
enhance the operation.
The most effective use of the Nova
Ray® MicroWing would help in keeping the ROV
steady in a boat tow with a side-scanning sonar.
This would allow for a good survey platform that
can go and investigate any abnormalities without
dropping any other gear in the water.
The ROV with the Nova Ray® MicroWing
could be used to inspect the bottom of a barge
or boat in a current. The ROV thrusters would
have to be powerful enough to overtake the current.
Or if running with the current, the tether could
be repositioned to keep the ROV facing forward.
The Nova Ray® MicroWing could
be modified to allow the forward camera to pan
up for better visibility.
Tests were conducted by Martin Fairall
and Jon Myers at the request of Marcus at VideoRay®.
Jon R. Myers
US Coast Guard
1519 Alaskan Way So.
Seattle, WA. 98134