I have a Gen II ITT device and it works quite well. I actually had the opportunity to test Gen I, Gen II, and Gen III devices in a ITT Nightvision display a few years back. I would have to say that I would not even bother with a Gen I device; the resolution is simply not there. You can pick out large objects but something like a lobster pot will get downed out in the background noise. I have the Gen II monocular and like it very much. I actually bot it used on ebay; a risk, I know, but it has lasted me several years without fail. The Gen III device is light years ahead of the Gen II. Its like looking at green daylight. Truly outstanding. I understand the militart has Gen IV devices the quality of which I cant even imagine. I do need to warn you, however, that they are best used on a moon- or starlite night; they dont work well in pitch black and if there are
lights behind the object you are looking at, these
lights may drowned out your display. An example of this would be trying to spot a mark outside a brightly lit harbor; the display becomes a series of green blobs. Obviously, going with a
handheld spotlight - rechargeable or wired - is an idea but I have found that given the typical level of moisture in the air at night on the water there are of little usefullness unless you are searching for an ojbect with reflective tape.