Dive Flags in detail: What you need to know for dive flag use in New Zealand

Introduction to Dive Flags

Dive flags are essential safety tools for any diving activity. They serve as visual signals to alert boat operators that divers are in the water, thereby helping to prevent accidents. Understanding the proper use of dive flags can mean the difference between a safe dive and a potentially dangerous encounter with a passing vessel. In this guide, we'll cover everything you need to know about dive flags in New Zealand, from types and usage to best practices and legal requirements.

Types of Dive Flags Used in New Zealand

Blue & White Alpha Flag

The blue and white Alpha flag is internationally recognised as a signal for "Diver Down." This flag indicates to other vessels that divers are underwater and that they must maintain a safe distance and proceed slowly. 

In New Zealand, the Alpha flag should be used whenever divers are in the water to notify other boaters to keep clear. It is especially important when operating in areas with high boat traffic, as it helps to prevent accidents and ensures divers' safety.

Red & White DAN Flag

The red and white flag, often referred to as the DAN (Divers Alert Network) flag, is also commonly used by divers. While the Alpha flag is the primary flag for signalling divers down, the DAN flag is an additional signal that is widely recognised within the diving community.

Legal Requirements and Best Practices

New Zealand Legal Requirements

In New Zealand, there are specific requirements regarding the use of dive flags to ensure the safety of both divers and boat operators. Here are the main rules:

• A dive flag must be displayed whenever divers are in the water.
• The flag must be clearly visible from all directions to alert approaching vessels.
• Other vessels must keep a distance of at least 200 metres from the dive flag or reduce their speed to below 5 knots.

Best Practices for Using Dive Flags

• Placement: Dive flags should be placed high enough to be visible from all directions, either on a boat or attached to a buoy. The flag should be in an unobstructed location to maximise visibility.
• Timing: Display the flag before divers enter the water, and keep it up until all divers are safely back on board.
• Flag Size: Dive flags need to be at least 600mm x 600mm, large enough to be easily seen from a distance, especially in areas with high boat traffic or poor weather conditions.

Responsibilities of Skippers and Divers

For Skippers

Skippers are responsible for ensuring the safety of divers by observing dive flags and maintaining a safe distance. They must reduce their speed to below 5 knots when approaching an area marked with a dive flag and keep a lookout for any signs of divers surfacing.

For Divers

Divers must ensure that a properly visible dive flag is deployed before they enter the water. Proper communication with the boat skipper and dive team is essential to ensure the flag remains visible throughout the dive.

Avoiding Common Mistakes

Incorrect Placement

One of the most common mistakes is placing the dive flag too low or in an obstructed area, reducing its visibility to other vessels. The flag should always be positioned as high as possible to ensure it can be seen from a distance.

Failing to Remove Dive Flag

Leaving a dive flag up when no divers are in the water can lead to confusion for other boaters, potentially causing unnecessary disruptions. Always ensure the flag is taken down once all divers are safely out of the water.

Dive Flag Signals for Boaters and Other Water Users

Understanding Signals

Boaters must understand that a dive flag means divers are in the water and proceed with caution. This awareness can prevent accidents and ensure a safe environment for both boaters and divers.

Promoting Awareness

Public awareness of dive flags is crucial for reducing incidents. Divers can help promote safety by educating others on the meaning of dive flags and the importance of respecting dive zones.

Conclusion

Dive flags are a simple but effective tool for ensuring safety during diving activities. By adhering to legal requirements, practising proper flag placement, and promoting awareness among other water users, divers can significantly reduce risks and ensure a safe underwater experience. Always remember: visibility and communication are key to keeping everyone safe in the water.

Additional Resources

NZUA Guidelines on Dive Flags