Exercising Submarines

Question 1

What is involved during the Red Grenade Procedure?

Answer 1

• Indicates sub is carrying out an emergency surfacing or is on the bottom and unable to surface
• Nav lights on at night
• “Emergency surfacing” broadcast to all units
• Consider stopping med/long range sonars
• Switch off/recover decoys
• Submarine will steer safety course whilst ships clear area
• Surface units break off attacks/cavitate

Question 2

What is involved during the Green Grenade Procedure?

Answer 2

• Submarine fires a green grenade to indicate attack using conventional torpedo
• If 2 are fired this indicates a nuclear torpedo

Question 3

What is involved during the Yellow Flare/White Smoke procedure?

Answer 3

• A yellow flare at night or white smoke during the day indicates the submarines position (intent to surface if second flare fired 3 mins later)
• Ships should acknowledge/remain clear

Question 4

When would the following SUBLOOK, SUBMISS, SUBSUNK be initiated?

Answer 4

SUBLOOK
- Submarine safety report overdue by 1 hour

SUBMISS
- Submarine safety report overdue by 6 hours (single 3 hours)

SUBSUNK
- Submarine operating authority has positive info submarine has sunk