[Siddhi]

goodness how charming. i'll answer anyway.

correct about TI, however IR and IR-seachlight (which I believe is 20-25 vision i the game) was standard on all T-72s as well as most other WAPA AFVs from 1979 onwards. obviously IR and TI are NOT the same, different micron level entirely.in RL we call them 2nd GEN IR/IL systems, m60A5 IIRC was equipped with an equivilant system. i believe the menitioned "II systems" are starlight systems and 1st GEN (Vietnam-era), one level below IR/IL and two-three beneath TI.

ALL SOVIET HINDs were equipped with this system of course, as well as most ATGWs that I am aware of.

These sights SHOULD penetrate a weak smoke screen and give night-engagement capability up 2,000m under average conditions.

From Jane's Armour And Artillery (on the T-72 1975 intial batch)

"The other two crew members are seated in the turret, with the gunner on the left and the commander on the right. The commander's contrarotating cupola has a single-piece hatch cover that opens forward with two rear-facing TNPA day vision blocks. In the forward part of the cupola is a combined TKN-3 day/night sight with an OU-3 infra-red searchlight mounted over the top and, to either side of the combined day/night sight, is another TNP-160 day periscope. Forward and slightly below the commander's cupola is an optical stadiametric range-finder.

The gunner's hatch opens forward and has a circular opening for mounting the snorkel for deep fording operations. In front of the gunner's hatch is a TNP-160 day periscope, while a TNPA-65 day vision block is fitted in the hatch cover itself. In front and to the left of the gunner's hatch is a panoramic day/night sight, which is used in conjunction with the infra-red searchlight mounted to the left and in front of the sight. The gunner's sight is the TPD-2-49 while his night sight is the TPN-1-49-23.

According to former Soviet sources, the TPD-2-49 monocular eyepiece stereoscopic range-finder sight enables targets to be engaged out to a range of 4,000 m. It has a field of view stabiliser for its vertical axis. In addition the sight has a ballistic computer that performs calculations based on input data for firing a specific type of 125 mm round, the temperature and density of the air and crosswind speed.

Using this sighting system, maximum effective target ranges are 4,000 m using APFSDS and HEAT rounds, 5,000 m using HE fragmentation rounds and 1,800 m using the 7.62 mm PKT coaxial machine gun.

Using the gunner's quadrant fitted as standard on the T-72, indirect firing can be accomplished out to 9,400 m. For this role, the HE-fragmentation projectile would be used.

The L2AG (Luna-2) infra-red searchlight is mounted on the right side of the 125 mm main armament rather than the left as in the case of the earlier T-64, although it is occasionally mounted on the left side (initial production vehicles)."