■Diving preparation

Diving facilities are used by many groups.

Use the baggage storage and parking lot in a way that does not inconvenience other groups.











When you reach the diving point, assess the conditions from a vantage point where you can see the entire planned diving course or training area.

Check the entire planned diving course or training area to ensure there are no boat routes or waves on the surface, and that surfacing or training can be done safely.









If the conditions at the planned diving course or training location are poor, cancel the dive and move to another location with better conditions.

At wind shifts, there may be calm conditions, but strong winds can occur after the wind direction changes.

Be aware of frontal passages and regional weather fluctuations.







Place lookouts on the shore and boats, and establish a monitoring system.




















Avoid scuba diving or training in areas where there are activities such as boating, jet skiing, or fishing.


Use diving flags, etc., to keep boats and other vessels away.

Be sure to equip yourself with drifting prevention gear to ensure safety during surfacing and in case of emergencies.
























To ensure the instructor can quickly address any issues the students may have, a surface float and descent line are set up at the descent point before entering.

To prevent trouble, do not set up the surface float and descent line after entering.

Manners are the basics of being a professional.


Check the surface of the dive course.




Cancel without hesitation.




Watch out for approaching boats.


Make sure the diving flag is in a prominent location!!



Use a surface float and prioritize safety.







Prepare with a double chain.


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Place a surface float at the descent point before entering.

Also, use the back of the dive leader check sheet to review the diving procedures with all participants, paying attention to the following.
















Tell all participants to act together as buddies, and to cooperate in adhering to the briefing.















Inform all participants to maintain a distance at which they can shake hands with their buddy when reaching out.




















Inform all participants not to overtake the buddy or leader in front and not to exceed the leader's maximum depth.


















Inform all participants to ascend at the same rate.




















If a certain amount of time has not passed since the last dive, it will be considered a repetitive dive.

Especially for afternoon dives, participants may have dived in the morning.

Make sure to check the residual nitrogen time for all participants in advance.

Avoid causing participants time stress, work stress, or ego stress.








Observe all participants' behavior before diving and gently talk to them to alleviate any anxiety.

Stress varies from person to person.
If a participant shows signs of stress response, let's abort their dive.



































Let's start the entry only after all members have donned their gear and completed the buddy check.















Let's clearly define the descent point and ensure that no team member drifts away during surface movement.

Don't forget the briefing.





Let's cooperate as buddies and follow the rules.





Buddy distance = distance at which buddies can shake hands





No overtaking






The ascent rate on STARS dive tables


Check residual nitrogen time.


Talkativeness, silence = stress response



Neuroticism = Stress response



Don't forget the buddy check instructions.