Modern submarines can move with surprising speed, but nothing close to 100 knots.
Definitely not... the maximum practical speed, today, is 32-35 knots.
100 knots = 115.078 mph
100 knots is 115.078 mph
tr1700 25 Knots
A knot is a nautical mile per hour. Thus it will take 10 hours at 10 knots.
The oldest boats in the the U.S. inventory (S-class) were pretty slow, only about 14.5 knots surfaced and 9 knots submerged. As the war and submarine designs advanced, surface speeds improved from 15 knots to 21 knots, with an averaage of around 19 knots for most. Submerged speeds remained steady at around 9 knots.
An unmaned submarine can go down to 15000
The fastest known nuclear submarine to date was the Russian ALFA class (NATO reporting name) submarine. Its design featured a lead-bismuth cooled reactor, enabling the reactor to be much smaller and powerful, making the boat design more streamlined and capable of reaching higher speeds. Its top sustained submerged speed was 41-42 knots, with speed burst capabilities of between 43 and 45 knots. I could reach top speed within a minute. Most boats can only maintain between 12-15 knots on the surface - this is because modern submarine designs are to allow them to travel much faster underwater than on the surface. The average for most boats is between 25 - 35 knots submerged, depending on class and screw configuration. Modern submarines are designed to go much faster underwater than on the surface - typically, top speed on the surface is around 17 knots for most boats.
around 35 knots to 65 knots
Depends on the type of submarine...
20 knots upwind, 33 knots downwind.
120 Knots is 138.12 miles per hour.