I would give its chirping abilities as its biggest advantage in that it's harder to jam since it changes frequencies with every pulse which makes it very difficult to track and jam if it's bouncing around frequencies.
BTW, I think both the BARS and the IRBIS-E radars display air to air & air to sea as well as air to air & air to land simultaneously if I'm not mistaken. I might have to check on that but I could've sworn reading it somewhere.
I got a fun radar story for you. When I was shopping for a new GPS to augment the older one on the boat, I decided to go with a Garmin package deal that included the 18 inch radome. For the first year or so, I didn't really use it that much because the GPS has so many new features to get used to and what I was more concerned with learning was setting waypoints and learning dangerous depth areas and even managing certain engine features.
Now we could go out at nighttime and it made a huge difference with feeling safe as that thing picks up items like you wouldn't believe it. And it's very accurate, to boot.
But after I got used to using it for nighttime outings and during heavy fog, I realized that it was much more valuable to just leave on all the time and overlay it on the navigation map. By doing that, I got one of the best spots ever which was one day last summer, I decided to go a bit offshore by myself to a marine sanctuary that is about 70 miles from Boston called Stellwagon Bank. It's basically a plateau that stays at around 100ft or so and because of that constant depth, it attracts a lot of very cool marine life from all sorts of sharks, to tuna to rays, turtles and mostly known for this area is whales. Lots of humpback wales and that one day, I'm blasting out that way with my rods ready to go.
i get past the beginning of the sanctuary and I see schools of fish on my fishfinder and so I stop and get ready to throw a couple of lines out and what do I see on the screen? Now remember I have my radar overlayed on the navigation screen but check out that long, red shape between the 262 depth demarcation line and the + sing on the touch screen in the top right corner. See that longish, red shape? That was a whale that was just below the surface! When I took that picture of the screen, I noticed that thing and so I looked in that direction and the thing surfaces for a second, blows out air from its blow hole and dives back down and I'm freaking out trying to get a pic of it when it resurfaces but it never does. I was out in the middle of nowhere and never ended up catching anything because I was just too busy looking for that thing to resurface lol. But that just goes to show you how incredible that radar is that it picked up the whale just below the surface right before it came up and you can even see the outline and the tail, but not the pectoral fins probably because they're deeper. I wish I had a better pic.
Click to enlarge.