You may be starting to see something called "IP codes" in the specifications of radios (and a rapidly growing number of cell phones) you buy. The "IP" stands for "International Protection", sometimes interpreted as "Ingress Protection". The IP code was created by the International Electrotechnical Commission (IEC), a non-profit, non-governmental organization that creates international standards for all sorts of “electrotechnology,” from semiconductors to batteries to home appliances to…your ham radio.
The IP ratings for liquid protection are not cumulative beyond IPX6. This means that any device rated IPX7 or IPX8 only had to pass one test (the test that determined its number), not any of the other tests. So while an IPX7 phone has passed a test where it was fully immersed in up to 1 meter of water for 30 minutes, it hasn’t necessarily passed the IPX6 test or the IPX5 test, both of which involve water being projected by a nozzle or powerful jets. In other words, your IPX7 phone might be fine if you drop it in the pool, but could be compromised if you spray it with a hose. (Of course, it could also be fine if you spray it with a hose—the point is that the IP rating alone doesn't tell you.)