You legally need to be displaying a dive flag if you are diving, snorkelling and swimming from a boat.  This is to keep you safe.  

It must be at least 600mm x 600mm and hung up high where other water users can see it.

This flag is 1m and exceeds the minimum legal size.

 Pro-Dive Alpha Dive Flag Features:

• Easy to setup
  
• Attachment String
  
• Slot to attach to slide onto Rod or VHF Antenna
  
• Informs other mariners that divers are in the water
  
• Meets NZ safety standards
  
• Colour: Blue/White
  
• Size: 1m x 1m

Know the rules and stay safe