The Futaba 4YF 75mhz radio is a perfect basic radio for submarines. It offers 4 channels of operation, which covers all of the basic functions of your submarine including: 
 
	
Throttle
	
Rudder
	
Ballast 
	
Dive planes

FEATURES: 
 
	
All-channel servo reversing for more installation options
	
Power and servo reversing switches located out of the way to prevent accidental changes
	
Battery meter with green and red LED for instant “go/no-go” status
 
Includes all components shown in photos above. 75mhz frequency.