Tactics & Equipment — Devices The 110' submarine chaser was a new class of vessel, and was equipped with a wide array of devices. This section contains information and photos on communications devices and other equipment on the chasers. C Tube Hydrophone CW-928 Radio Telephone Switchboard CW-933 Radio Tubes - Temperature Issue Experimental Listening Devices K-Tube Frame Life Raft Pelorus Position Plotter Position and Course Plotting Devices Radio Room Equipment Signal Light Testing the K-Tube for Night Scouting Trailing Wire Wireless Telephone Training: Harry Tegler Book traversal links for Devices: Equipment on the chasers ‹ Taking on Fuel while Under Way Up C Tube Hydrophone ›