Before you go on your Back-up, THINK 2.21 STOWED !
Stowed means:
Stowed
When items such as electronic devices, literature, etc. are required to be stowed, the items are not properly stowed until they
are placed out of sight in the employee's grip, luggage, back pack, etc. Personal electronic devices must be turned off and are
not considered stowed when placed in pockets or device holders.
19.GL: GENERAL CODE OF OPERATING RULES GLOSSARY
A small sling backpack 🎒 is a "grip", I used to carry one on backups. I also had gloves and extra earplugs in it as well... When it's time to work put your electric devices in it, you won't even notice the weight...