Crab;
From my experience the crew tend to carry ELT's, but they are rarely (never in the hot places I worked, but I'm happy to be corrected about anywhere else) fitted to aircraft to keep the weight down. The North Sea always went belt and braces on ADELT, ELT etc, but the performance margins were better due to the climate.
I often wonder with 20/20 hindsight whether the oil companies and everyone else in the off-shore chain ever contemplated the risks to safety caused by the constant threat of contract removal, price cuts and the occasionally awful commercial pressure placed on crews. Talking to mates who are still off-shore the current fear of unemployment is causing huge stress across the industry. Does Target Zero take worried, distracted and possibly fatigued crews into account?
SND