For long liner, Drift nets fishing vessels, using radio buoy system is effective way to
detect the nets position. By connecting our radio buoy, TB-558 and TB-308, and
a fishing gear, such as long liner and raft with a glass ball, the radio buoy transmits
its signal to the fishing vessels. Our Direction finder, TD-C358, TD-A157 and TD-
L2200, can detect the buoy position by homing method and display buoys
With our sele-call radio buoy, TB-558S and TB-308S it is much cost effective and
avoid own nets or line are caught by other fishing vessels. The sele-call buoys
transmits its answer signal only when they receive calling signal from mother
vessels. Calling signal is decided for each sele-call radio buoy and the signal itself
is generated by calling signal generator, such as our model, TR-L371/371A and
our new model THR-L400/400-II. THR-L400 can generate calling signal and this
model has built-in transmitter, this model can transmit calling signal to call sele-call
radio buoy without other external transmitter, such as SSB. In case of using THR-
L400-II, by connecting an external transmitter, calling signal is generated by THR-
L400-II and transmitted through the external transmitter.
When sele-call radio buoy receive its own calling signal, it starts to transmit answer
signal to inform mother vessel from which direction answer signal is transmitted.
Then, to detect which direction sele-call radio buoy is flowing, our direction finder,
such as TD-C358, and TD-A157, is used. Direction finder, detects the buoys
direction and your fishing will be completed successfully.
Our new model, Hybrid Direction Finder, TD-L101 can call sele-call radio buoy
and detect the buoy position by its all in one main unit.