When focusing on the lure from the deck, your field of view is basically limited to surface features, and when you're search-casting and fixated on the lure, your cone of vision
The vampires also act exactly like the protagonists in the Metal Gear Solid games - they have a cone of vision
you have to avoid.
MICROPACK's FDS-301 is designed to detect a 10 Kw hydrocarbon pool fire up to 144ft within a 90-degree cone of vision
in both indoor and outdoor applications.
There is virtually no depth perception, and the cone of vision
is extremely narrow.