Osowiec Class Heavy Frigate

"its an oldie, but definitely not a goody." -UNSC serviceman
==Overview==
The Osowiec Class Heavy Frigate was the first UNSC ship type to make use of the then newly introduced Magnetic Accelerator Cannons.
First built in the early 2400s as UNSC naval doctrine was reformed around the use of new MAC guns in light of rising rebellion, the Osowiec dropped the light armaments of the early UNSC navy and began toting the signature big stick of the unsc navy; the MAC. 
At 406 meters in length the ship was considered small and comically under-powered by the onset of the late 2460s.
== Service Record ==
During the Osowiecs inception in 2412, the vessel was considered state of the art. Doting a newly introduced MAC gun the vessel was meant to act as a mobile and agile ship killer to test out the new weapon platform. When first introduced, the line was considered heavily armed and very agile. It performed very well against early human pirate ships and in its role to support the larger human warships.
Its performance quickly led the UNSC to standardize the MAC to be the main gun for all UNSC warships.
As the years went on, the frigate was replaced by more modern designs such as the Charon, Paris, and Stalwart. By 2467, the vessel was considered small and under powered, but remained in service with very limited production. Those that were produced post 2452 were upgraded with better thrusters and reactors to make them faster. The upgraded line proved to be faster and more agile than the modern Paris and Charon it later served along side allowing it to be a heavy fast attack vessel. During the 2480s and beyond, the vessel was replaced by more powerful corvettes that filled the Osowiecs role and production of the class ceased entirely and those that remained were delegated to patrol duty with in the CMA and UNSC Navy reserves. The class saw action during the early human-covenant war and like most UNSC ships, fared extremely terribly against the xeno navy. By 2531, all remaining Osowiec class heavy frigates had been destroyed.
== Compliment and Armaments ==
The ships of this line boasted a Mk-1 light coil MFSM MAC. Supporting this were 7 m-910 point defense guns, 12 acher missile pods, 3 30mm point defense gun, and a single 100 millimeter naval coil guns.
The post 2542 models also had a single nuclear missile tube.
Her crew consisted of 366 naval personnel and 40 marines.
The class carried a single pelican in its loading bay, and had two warthogs for landing teams.