JANUARY 2010 - TD 220a DEPLOYMENT GUIDE, RDCP600
Page
69
Reliable solutions
When a concrete block is used, laying the cable should be done from land.
In the brake water zone, the best way to protect the cable is to thread it through a durable plastic
tube that is bolted to the ground.
On the seabed, place sand bags or concrete blocks over the cable at strategic places to secure it to
the bottom.
In harsh environment it may be necessary to bury the entire cable in the bottom.
During operation, it is recommended to use a diver to ensure that the instrument and cable are
safely installed on the seabed.
For future service, write down the site position from a GPS receiver.
4.5
Deploying the Trawl resistant Bottom Mooring Frame
Alternatively may a trawl resistant bottom mount with popup buoy be used, refer to TD220c
RDCP Primer
.
4.6
Deploying the Inline Frame
An illustration of the RDCP deployed in an in-line mooring frame is given in Figure 4-4. A
mooring string is connected to a Viny Float set in one end and an anchor in the other end.
NOTE!
Calculations of stability and buoyancy must be carried out for the individual mooring.
The anchor must be of suitable size and weight to keep the instrument in one position.
The instrument and optionally other sensors are connected to the mooring string at desired
depths.
For convenience a frame can be connected to the mooring string, and the RDCP 600 can be placed
into the frame at deployment.
The minimum distance between the RDCP 600 and the Viny Float set is 5 meters.
Several in-line frame systems can be linked together using a floating rope or a sink rope between
two anchors.
Also, a bottom anchor can be connected to a two-parted string of floating rope and sinking rope
with a retrieval float at the upper end to ease the retrieval of the system.
