(a) The water inside the sonar dome must not be discharged for maintenance activities unless the use of a drydock for the maintenance activity is not feasible.

(b) The water inside the sonar dome may be discharged for equalization of pressure between the interior and exterior of the dome.

(c) A biofouling chemical that is bioaccumulative should not be applied to the exterior of a sonar dome when a non-bioaccumulative alternative is available.