MIL-V-62475 Vehicle, Fire Support Team, M981 FistvThis specification covers a full-tracked, land combat, fire support team vehicle, with a high degree of tactical maneuverability.

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MIL-V-62475(AT)

3.5.1.2  Maintainability.

3.5.1.2.1  Maximum time to repair (MAXTTR).  The maximum time to repair for the FISTV system, excluding the chassis and optics, shall be 0.7 hours.  This time must include 90 percent of all corrective maintenance actions (see 4.6.4.1).

3.5.1.2.2  Maintenance ratio (MR).  The FISTV vehicle system shall have an MR in terms of maintenance manhours (MMH) divided by operating hours that does not exceed the values stated for the following categories of maintenance (see 4.6.4.1):

TABLE II.  GFE reliability.

NOTE:  The above results in a mission reliability baseline of 0.8935 for the FISTV vehicle

GFE items.

3.5.2  Automotive operation.  The FISTV vehicle shall meet all the operational requirements regarding reliability, durability and  maintainability as specified in MIL-C-62310 for the modified M113A2 chassis, except where otherwise specified herein (see 4.6.4.1).

3.5.3  Mission profile.  The FISTV vehicle mission profile shall consist of two mission profiles.  A total of 54 miles (87 km) shall be accumulated on primary roadways at 18-25 miles per hour (mph) [14.5 kilometers per hour (km/hr)] in nine mile (14.5 km) increments.  This profile shall consist of one operational scenario, 15 ranging scenarios and five designating scenarios per segment with three segments per profile (see 4.6.4.2.1).

3.5.4  Speed.  The FISTV vehicle shall sustain speeds of 32 mph (51 km/hr).  The targeting station shall be in the stowed position for norma1 travel.  Head erect travel shall not exceed

50 m (164 ft) with the speed not to exceed 5 mph (8 km/hr) (see 4.6.4.3).

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