Thanks Alain!
I do have and can add a seperate temperature sensor for the same PIC and the sub only run in swimming pools, ponds, and lakes with clear water. According to the fine fun folks at Eagletree systems I could never reach the top speed in water as the 0-2 psi range is for airplanes and speedboats. They use a "strange" calculation method they do not wish to disclose. Good catch by the way! My sub is very close to the sub used in the movie "The Hunt for Red October" which is a Russian Typhoon! So what would the caculation code look like?

Best, Ed