1. Rinse with clean water

When the submarine has just been used, please wash it with clean water as soon as possible and remove the debris, paying particular attention to the thruster and other parts, which will help to slow down the corrosion rate of metal parts.

2. Replace the sealing ring

When the submarine has been placed for more than 6 months or the submarine has been operating for more than 100 hours, please replace the O-rings at the end cover of the battery compartment and the vent bolts (2 locations) in time.

[Note: After the O-ring is used many times, repeatedly, and for a long time, the performance will decrease to a certain extent, and it needs to be replaced regularly. ]