Payloads vary from application scenes and carrier itself. Water rescue robot is compatible with 5 payloads used in water rescue, while drone is compatible with 8 payloads on the list.
HERO4 Black delivers 2x the performance of its best-selling predecessor and now captures cinema-quality 4K video at 30 frames per second (fps), 2.7K video at 50fps and 1080p video at a blistering 120fps, virtually eliminating rolling shutter in most scenarios while allowing for time-bending slow motion effects. So it would be crystal clear shooting videos while getting evidences on-site during rescuing.
The lifebuoy is carried by water rescue robot and helps rescue a drowning person or more if carried more than just one having more people saved in a real quick way.