Just as Dave stated on his reply, some transceivers use a magnetic compass while searching (e.g., Mammut Pulse and Ortovox S1). It is especially important that you keep all magnetic items and your electronic devices (mobile phone, MP3 player, GPS navigator etc) away from these transceivers while searching. The Black Diamond Magnetron carabiners include a warning saying that the carabiners should be kept 50cm (20 inches) from avalanche transceivers.
Hi Alistair,
If you are just using them for racking then oval wiregate carabiners are the way forward! The symmetrical shape makes it easy for the nut sizes you don't want to slide out of the way saving you time and energy on your climb.
Hope that helps,
Dave
Hi Mikhael,
If there is ever a connection that is your only lifeline, i.e when you are rappelling on an Italian hitch, you should use a locking carabiner. This could be a screwgate, magnetron, twistlock or even a twin-gate but not a snapgate.
Personally, I would recommend using a large HMS carabiner with an Italian hitch. This makes it easier to see if yo have tied it correctly and also makes the rope easier to manage. Any locking carabiner would technically be safe though.
Hope that helps,
Dave
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