Select your product to confirm this information applies to you
Garmin Radar RPM
Below is a list of Garmin's Radars and their Revolutions Per Minute (RPM):
GMR™ 18 marine radar | GMR™ 18HD marine radar - 24 and 30 RPM (can be set to "slow or "fast")
GMR™ 24 marine radar | GMR™ 24HD marine radar - 24 and 30 RPM (can be set to "slow or "fast")
GMR™ 20 marine radar | GMR™ 40 marine radar - 24 RPM
GMR™ 21 marine radar | GMR™ 41 marine radar - 24 RPM
GMR™ 404 marine radar | GMR™ 406 marine radar - 24 or 48 RPM (can be set to "slow" or "fast")
All GMR™ xHD | All GMR™ xHD2 marine radar - 24 or 48 RPM (can be set to "slow" or "fast")
All GMR Fantom™ Open-Array radar - 24 and 48 rpm (High Speed only available in Single Range mode, with MotionScope disabled, and on range settings of 12 NM or lower)
GMR Fantom™ Radome - 24 and 48 rpm (dual rotation)
This information can be found in the Specifications section of the Installation Instructions for each Radar.