One of those is the good answer, I could say: make Your mind up, and You would give the answers one by one, till You stumble over the good one. It's the 4rth answer which is the correct one.
When there was the first rumour about the Jumbo Javelin I asked in various parts of the forum about the working of the Radar-Screen. I was assured it would be working like the one on the other vessels, like the Vermaas, The pusher etc. So I assume that those fine people at Vstep where in such a hurry to give the J J away for free that they didn't realize about the missing radar.
Anyhow, You're next Diamant.