When you read Interpretation 8.1a/7 you'll find this:
For example, without improving any of the conditions affecting the stroke, when the ball lies anywhere on the course, a player may probe the area around the ball with a tee or other object to see whether his or her club might strike a root, rock or obstruction below the surface of the ground when the stroke is made.
You need to recognise the limitation imposed on you by the reason for the probing. That is, it is carried out for the sole purpose of finding out if there s anything below the surface of the sand which your club might hit when making your stroke. it's not a digging mandate to find out how shallow or deep the sand is. Consider what probing means. It's not poking around shifting sand with a clubhead; it's pushing something narrow like a tee or a pencil into the sand to see if it strikes an object. Minimal disturbance of the sand. And consider too you should only be probing as far down as your clubhead would go in carrying out the stroke. You may as well leave the BBQ skewers in the garden.
Reading this has made me wonder.
Our bunkers are lined by a felt type lining.
Quite often the fibres of the lining protrude above the sand.
1 So is it legal for me to probe around the ball to see how shallow the lining is ?
2 Also is it legal for me to probe if I am going to move my ball by claiming relief at the site I am going to drop to see if there is sufficient sand to play a splash shot..
This is a big problem on my course as there never seems to be enough sand ( wind is a problem) to cover the linings properly to play a “normal” bunker shot.
I am pretty sure players at my club would be probing every bunker shot as this is the biggest complaint in the clubhouse every Saturday.
We had a survey of members thoughts months ago but nothing has been done to rectify it..