Earthforce Monsoon Class Gunboat:

In the year of 2266 Earthforce general Meade opened a competition for the design of a Gunboat class ship, officially to replace the aging Olympus class corvettes. Unofficially the competition was held because Earthforce had been very impressed by the performance of the Whitestar class ships of the Interstellar Alliance. While all senior officials realized that even with gravitic technology now at their disposal the new ship would never equal the Whitestar design, they were also aware that a dedicated gunboat would be a very potent weapon when used in large numbers.

http://www.kitsune.addr.com/SF-Conversions/Rifts-B5-Ships/Earth_Monsoon.htm