Sec 1: 2-2 Basic Maintenance: Handling Precautions
2.2.1 APX 7000 R Radios Only
If the radio battery contact area has been submerged in water, dry and clean the radio battery 
contacts before attaching a battery to the radio. Otherwise, the water could short-circuit the radio.
If the radio has been submerged in water, shake the radio briskly so that any water that is trapped 
inside the speaker grille and microphone port can be removed. Otherwise, the water will decrease 
the audio quality of the radio.
• The APX 7000 radio has a vent port that allows for pressure equalization 
in the radio. Never poke this vent with any objects, such as needles, 
tweezers, or screwdrivers. This could create a leak path into the radio and, 
in the case of APX 7000 R radios, the radio’s submergibility will be lost.
• The pressure equalization vent is located under the main speaker grille 
near the top left side. Never obstruct or cover the small opening on the top 
left with any object, including a label. Ensure that no oily substances come 
in contact with this vent.
•(APX 7000 R Radios Only) The APX 7000 R radio is designed to be 
submerged to a maximum depth of six (6) feet, with a maximum 
submersion time of 2 hours per U.S. MIL-STD. Exceeding either 
maximum limit may result in damage to the radio. For specific U.S. 
MIL-STD details, see Section “8.10 Ensuring Radio Submergibility” on 
page 1:8-39.