Garmin Swim 3 ???

You know the speed or pace settings for the endless pool. Do the math, you can easily measure the time.

distance=speedXtime=(time/pace)X100

If I'm not mistaken.

Also open water function with GPS turned off gives a rough estimation I think.

Yes, the formula is correct:

Distance = Speed × Time

Ensure Units are Consistent:

Convert the speed into kilometers per minute (km/min) or meters per second (m/s) depending on your preferred unit for distance.

Convert the swimming time into hours, minutes, or seconds, corresponding to the speed unit.

For Example:

Given:
Endless pool current Speed: 3 km/h
Swimming Time: 30 minutes

Steps:
Convert time to hours:
30 minutes = 0.5hours (30/60)

Apply the formula:
Distance = 3km/h × 0.5 hours = 1.5km

General Conversion Factors:
1 hour = 60 minutes
1 km/h = 1000 m / 3600 s = 0.2778 m/s

Ehhh this Math :))))) 

garmin swim 2 is 4 years old and there is no rumors about a garmin swim 3, so, which is now the best sportwatch (garmin or other) only for swimming purpose?

I think garmin swim 2 is outdated in terms of accuracy of the heart sensor, swimming features... or for swimming is it still the most accurate and complete?

Thanks 

3199504 said:

garmin swim 2 is 4 years old

5 years old, actually. 

Swim anywhere, train everywhere with the Garmin Swim 2, a GPS smartwatch with underwater wrist-based heart rate - Garmin Newsroom

October 15, 2019 7:00 AM EDT
OLATHE, Kan.–(BUSINESS WIRE)–
Garmin® International, Inc., a unit of Garmin Ltd. (NASDAQ: GRMN), today announced the Garmin Swim 2

Garmin swim2 is not able, but is any other garmin able to get vo2max during swimming?