PRESSURE VESSEL 



OPEN MICROPHONE 

 (ON OVERHEADI 



FREEZER 



AND 



REFRIG. 



BOTTLE CHARGING 

 STATION 



CONTROLLER 



T. V. CAMERA 



-5^ 



_o;x 



INTERCOM OPEN 



MICROPHONE 



FIGURE v. — LOCATION OF MINITAT COMMUNICATIONS 



to a research vessel in 1965. The steel hull is 143' long with a beam of 33 

 feet and a draft of 14 feet. Displacement is 900 tons full. The 1450 SHP 

 diesel electric propulsion system gives a cruising speed of 11.5 knots and a 

 top speed of 12.5 knots. Endurance is 45 days and range is 9600 miles. Her 

 normal complement is 16 men but during the station keeping duties of TEKTITE 

 the crew was reduced to ten men. Figure 8 shows the arrangement of the mini 

 tat support equipment on the UNDAUNTED. 



The breathing gas supply system consists of a high pressure air subsystem, 

 a low pressure surge air subsystem, a low pressure air subsystem, a low pres- 

 sure purge air subsystem, a nitrogen makeup gas subsystem, an oxygen supply 

 subsystem, and a gas flow control console shown in figure 9. All of which 

 were located on the main deck of the UNDAUNTED. 



The high pressure air subsystem provides high pressure air to the minitat 

 for charging on the on-board air storage bottles . It also supplies high 

 pressure air to the deck mounted decompression facility (DDC) . It consists 

 of the high pressure (3000 psi, 20 scfm) side of a HYDAP high pressure/low 

 pressure electric motor-driven RIX compressor, a backup KIDDE gasoline 

 engine-powered high pressure (3000 psi, 3.8 scfm) SCUBA charging compressor, 

 a high pressure receiver bank of sixteen 240 SCF bottles, fittings for charg- 

 ing SCUBA bottles on the UNDAUNTED, and appropriate plumbing to supply high 

 pressure air to the gas flow control console and to the DDC. A high pressure 

 hose leading from the compressors to the receiver bank is fed through a pro- 

 tective rigid conduit welded to the deck. 



The low pressure surge air subsystem provides a low flow rate of air to the 

 minitat to maintain the oxygen concentration in the breathing gas at the 

 desired level during normal operations. It consists of a Bell and Gossett 

 motor driven low pressure (175 psi, 2.2 scfm) teflon ring piston compressor 



III-8 



