let me ask you this, how the hell are you supposed to use a 300km missile without datalink when your OTH radar (bandstand) can only see out to roughly 200km? You can't just toss a missile on an approximate vector and hope it locks, because the missile's seeker is not powerful enough. Sure it's an option, but not the best one. Every long range missile has a datalink capability. C-803 has it, Harpoon has it, Exocet's longer ranged versions have it, Sunburn has it, Bazalt/Vulcan have it (before autonomous search).
Just because the missile has a fire and forget capability doesn't mean it doesn't use datalink. On the contrary, fire and forget applies ONLY to the terminal stage. All ARH missiles are considered fire and forget, and guess what? All of them use datalink to get into the killzone.
Also, INS using the present target location must be updated with the target's new position contineously. Do you honestly believe a target would just remain it's speed and heading under combat situations? However, I do have to concede that, because of the speed of the BrahMos, it can cover the maximum 300km rather quickly. But I have to iterate again that fire and forget does not mean an entirely autonomous flight.
I cannot find any reference about Yakhont's datalink, for or against, so I'll just shelf this debate and perhaps you can go ask people at BR and I'll ask someone at CDF. But you cannot discount my arguments.
On a sidenote, the Alfa missile, which is based on the Yakhont, does have datalink capabilities plus GLONASS.
"What Yakhont, Moskit and Sunburn lack are :
1] Satellite guidance like GPS/GLONASS in conjunction with INS.
2] UAV datalink (used for updating position on a moving target).
Note : The AI developed for Yakhont/Brahmos is useful for slow-moving ships only (it involves guess-work and pattern analysis). It will be useless against a fast-moving frigate, or a fast land vehicle.
3] Image homing analysis (similar to DSMAC used in Tomahawk).
4] Possible fast laser-ignition (development is a closely guarded secret).
5] Capability to engage land-based targets. This requires a highly sophisticated guidance system, since the missile cannot follow the pattern of sea-skimming and terminal pop-up on land contours like hills."
IndianFighter, Moskit IS the Sunburn, Sunburn being the NATO designation.
1) First of all, I question GPS/GLONASS in an antiship missile, especially GPS, because the signal is probably not miitary grade. But it is true that BrahMos has it and the other two don't.
2) Let's not mention UAV, that's trivial. The datalink issue with Yakhont can't be decided, but Moskit actually has datalink. Why? Because it is not an autonomous system. Not many people know this, but one of the primary drawbacks of the Moskit is that it does not carry enough processing power onboard for terminal stage target discrimination, so it sends the data BACK to the ship for calculations. The 2 side effects of this is that A) Datalink capability is inherent in Moskit B) there is a primitive image analysis capability, not on the missile, but in the system, although this is actually radar return discrimination instead of true visual data.
3) I thought image analysis is still in the pipelines. But regardless, what BrahMos achieves using image analysis, Yakhont achieves uses the AI while Moskit just sends it back to the ship. (The notion of Yakhont's AI being effective against slow moving targets is really taken out of context, just what major warvessels travel above 60 Knots? ) However, Moskit, in this context, is especially suspectible to enemy ECM. Once an Australian Navy Officer, when asked how they'll deal with the Moskit, said, "Softkill all the way". (I suspect that the image analysis capability is tailored toward the land attack version of the BrahMos)
4) I'm not sure what that means. Laser fuse for detonantion or laser "spark plug" for ignition? Because they're trivial.
5) I question the abilities of a Mach3 missile acting as a LACM. Of the advanced LACMs in service today, their primary mode of guidance is TERCOM with GPS corrections. Do you honestly think a Mach3 missile can use TERCOM?