Thanks for quick reply.
But I still have questions to ask.
1. Is the battery placed just below the syringe?
2. What type and size is the battery?
3. Where is the side thruster, bow or stern?
4. Is there any dive plane control?
5. When push the syringe, where does air in the syringe go?
6. What is the function of green tubes that connects to the syringe?
Sorry about these questions, hope they would take you much time to reply.
1=yes
2=blackberry first generation phone battery
3=stern in this sub
4=no for this sub, fixed slight downward
5=out to top for partial submerge for this semi static sub
6=water to top