Use a float near the end of the line!
I have a clip at the end of my anchor line which attaches to the obvious place, which is the bow handle. I shorten it by looping the line at a shorter length and joing that to the clip in the bow handle.
About a meter from the end of the line ,I have a float, so, you can abandon the anchor line and still retrieve it.
This way, you can mark an area, if doing a search, or retrieve the anchor if snagged, at a later time.
When I was in the Manukau Volunteer Coastguard here in Auckland NZ, we were searching at night and tried to do an aircraft style square pattern a base leg, followed by a down wind leg, then crosswind leg, the final approach.
With the wind and tide, we bumped into the float after the first two legs.......
We were under way, at slow speed and shutting the engine off , whistling and listening, search lights, but tried to do each step consistently for accuracy.
Wind and tide can be tricky stuff at night.
This was in the late 90s when "cutter boats" that is members own boats could be used in a search, and we got free gas if the job had Police numbers.
I had a4.2 Zodiac Futura with no gps, and hand held spot light running off the plug in a 50 Yamaha.
We got a live one!