In relation to the French Laws
ARRETE PREFECTORAL N° 019/2018 REGLEMENTANT LA NAVIGATION ET LA PRATIQUE DE LA PLONGEE SOUS-MARINE LE LONG DU LITTORAL DES CÔTES FRANCAISES DE MEDITERRANEE
https://www.premar-mediterranee.gou.../arretes/84d7b346ea210987d2b860921844be8d.pdf
Translation as follows for the non -french speakers
"Any single diver (scuba or freediving) must signal his presence with a red flag with a white diagonal.
Within a radius of 100 meters from a flag indicating the presence of a diver, an appropriate speed must be maintained at all times to ensure the safety of the diver. appropriate speed must be maintained at all times to ensure the safety of the diver; in any case, this speed will be limited to 5 knots.
5 knots. This last provision also applies around a brightly colored buoy signalling the presence of an underwater hunter."
In relation to the Swiss Laws it is also obligatory ( Article 32) ...
Fedlex
"Lors de plongée subaquatique à partir de la rive, un panneau reproduisant la lettre «A» du Code international de signaux (pavillon en forme de guidon à deux pointes dont la moitié côté hampe est blanche et l’autre moitié bleue) doit être hissé."
I must admit that I have dived in the Lac Leman and the Lake of Neuchatel from the Swiss shores and have never seen an Alpha Flag.. In my club they don't let us dive without it, which is very unusual as I am in a French club, normally it's the Swiss that are sticklers for the rules. For anyone that doesn't know the shores of Lake Leman ( Wrongly known as the Lake of Geneva) it is about half and half Swiss/French. ( The Swiss have the longest coast line but not by much ). I dive mostly in Hermance and Tougues sites ( Swiss and French respectively ) and there is only about 2 kms between each site, they are truly on the corresponding borders.
I honestly don't care too much about the laws but the assurers can be a whole other world of pain.. I work for an assurer and believe me they will very quickly show you the clause that states that you are not covered because you didn't apply article "X" when it suits them.
My wife had a visit to the Hyperbaric chamber in Geneva recently, luckily nothing to serious, but I am glad that we didn't have to pay the bill. DAN were very nice
( and also the European Insurance card).
Anyone my question concerning the buoy has been answered and I am happy to learn that solutions do indeed exist and that appear to be relatively easy to solve, a 2kg anchor.