Water Rating Definitions

Garmin rigorously tests their devices to make sure they’ll survive the activities for which they were designed. You should note that even if a device is above a depth it is rated for, it might still suffer water ingression if it is subjected to an activity that creates pressure on it that exceeds that depth rating.
Water Rating	Definition	Suitable
Sources: Garmin & NEMA.org.
IP65	withstands ingress of dust (dust-tight); vacuum must be applied. protected against low-pressure jets of water. water projected at all angles through a 6.3 mm nozzle at a flow rate of 12.5 liters/min at a pressure of 30 kn/m2 for 3 minutes at a distance of 3 meters	light spray, rain, outdoor use in moderate sea conditions
IPX6	protected against powerful jets of water. water projected at all angles through a 12.5 mm nozzle at a flow rate of 100 liters/min at a pressure of 100 kn/m2 for 3 minutes from a distance of 3 meters	heavy spray, driving rain, boat washing, outdoor use in rough sea conditions
IPX7	withstands incidental exposure to water of up to 1 meter for up to 30 minutes	splashes, rain or snow, showering
IPX8	can be submerged to greater than 1 meter with the exact depth to be defined by the manufacturer. the depth is uniquely defined for each product and can be found on the product page.	temporary submersion
1 ATM	withstands pressures equivalent to a depth of 10 meters	splashes, rain or snow, showering
3 ATM	withstands pressures equivalent to a depth of 30 meters	splashes, rain or snow, showering, jumping into water
5 ATM, Swim	withstands pressures equivalent to a depth of 50 meters	splashes, rain or snow, showering, swimming, diving into water, snorkeling
10 ATM	withstands pressures equivalent to a depth of 100 meters	splashes, rain or snow, showering, swimming, diving into water, snorkeling, high-speed water sports
Dive (up to stated depth in meters)	tested to engineering standard en13319 for dive compliance	scuba diving, snorkeling, and high-speed water sports