Whatever we call it ............ its the same thing
It seems to me that this precautioary landing is because pilots are forced into the situation so what we call it is not the issue.
The bigest problem is that most pilots dont use the option until they are totaly backed into a corner and wait until it has to be done RIGHT NOW.
This is when the trouble starts and it becomes less and less like EX17 (not the one that some places teach down to 500ft) and more like a panic measure.
No one landing like this is going to be quite like another so a wide range of courses of action need considering, Much like what is happening on this thread but this has to be done in the cold light of day, not when backed into a corner.
Those who teach Ex17 down to 500 ft and then just tick the boxes on the student training record are just ripping the student off and setting the student up for an accident rather than an inccident should the student subsequently be backed into a corner as well as making life more dangerous for those on the ground.
There are undoubtedly occations when a student selects a field that will result in a 500 ft rule infringment and that practice has to be discontinued. This does not represent a satisfactory completion of EX17, it just indicates that it will have to be repeated until the student demonstrates the ability to perform to the required standard.