Week 7, Day 34

As we got the Scuba gear ready (fill the bottles and do a pre-dive check on all the equipment), we were given our daily brief and quickly got dressed. The dives included a swap of demand valves (or regulators) and emptying our masks before we were set off to do our task.
the dives involved the use of 'lifeline signals'. These are use to tell the diver where to go / what to do without the use of comms. While the divers were underwater, the supervisor would throw a shackle on a piece of rope and we had to find it by following the instructions given to us from the surface:

From the tender to the diver:
1 pull - Get the divers attention
2 bells - face your umbilical and head out
3 bells - face your umbilical and head right
4 bells - face your umbilical and face left
5 bells - face your umbilical and head back
2 pulls - I am sending you down a rope's end
3 pulls - You have came up too far, go back down slowly until checked
4 pulls - come up
4 pulls and 2 bells - come on, hurry up, come up for surface decompression

From the diver to the tender:
1 pull - to call attention, made bottom, left bottom
2 pulls - Send me down a rope's end
3 pulls - I am going down
4 pulls - May I come up
4 pulls and 2 bells - I want to come up (assist me)
sucession of pulls (more than 4) - Emergency