TURNIGY marine ESCs are built with USA IR mosFETs for long run times and less heat.
Boat escs have a different requirement to air or car escs. Their need for sustained high-amp draw makes plane escs unsuitable and car escs with large amp spike capability, unnecessary.
Thats why TURNIGY marine escs are designed purely for boats, and coated in anti-static then water resistant laquer to prevent shorting should the esc get wet. They can handle sustained high amp/volt loads and handle heat better than a car or plane esc.

What makes this ESC better than others?
-Well designed MCU, with efficient code makes for faster sync and accurate timing.

-Fast clock cycle MCU combined with efficient code means 100,000rpm cpu cycle* 
-Efficient FETs reduce heat and deliver sustained switching at high amp/voltage.
-Well designed PCB (6 layer) and circuit diagram handles high-amp without burnout.
-Large motor comptability. Smooth starts, linear throttle curve.

-Active water cooled heatsink that actually works.


Programmable settings;
Reverse
Low Voltage (none/2.8v/3v/3.2v/3.4v)
Brake: (none/soft/hard)
Timing (0.00/3.75/7.50/11.25/15.00/18.75/22.50/26.25)

Constant Current: 120A
Burst Current: 240A
Resistance: .0007ohm
Battery: 2-6S Lipoly
BEC: 3A/6v
Motor Type: Sensorless Brushless
Size: 94 x 33 x 18mm
Weight: 91g

*Speed: 100,000+rpm(2 Pole)