目次

The Role of an Instructor

Certification Card

Course Conditions

Information Gathering

Dive Planning

Open for Registration

Class Control

Practical Training Methods①

Practical Training Methods②

Practical Training Methods③

Practical Training Methods④

Practical Training Methods⑤

Risk Management

Duties and Responsibilities


Preparation for a course should be carried out in the following order: information gathering → plan development → participant recruitment.


















■Methods of Information Gathering

Obtain the latest information from diving magazines, local resort facilities, and official meteorological websites.

If information cannot be obtained from diving magazines or local resort facilities, the area may not be suitable for training.

Avoid planning courses in such locations.






To prevent conflicts with fishermen or other vessels at the dive site, use local resort facilities that are familiar with local rules.

























In particular, snorkeling, skin diving, and introductory diving should be conducted in pools or confined water environments.






Try gathering information on the internet.



Obtain the latest local information.

Confirm whether it is a pool or a pool-like environment.

■Checking the Diving Environment

Confirm the following information:

① Marine life conditions

② Currents, tide tables, and local tidal conditions

③ Surface visibility and underwater visibility

④ Seabed topography, obstacles, and vegetation conditions

⑤ Water temperature

⑥ Surface usage by fishing boats and leisure boats

⑦ Placement of fishing equipment such as nets and traps

⑧ Restricted areas






















⑨ Seasonal weather conditions

In some regions, seasonal winds may prevent diving for extended periods.

Also gather information on alternative dive sites.











■Use of Resort Facilities

Pay attention to restrooms, rest areas, and meal arrangements at the site.

























■Transportation

Confirm transportation to the site.

Check whether convenient public transportation is available for meeting and dismissal times.










■Guide Divers

Most local resort facilities have guide divers familiar with the local waters.

In unfamiliar areas, arrange for an experienced guide diver.

Confirm costs and reservation methods in advance.



Are there any dangerous marine creatures?




Simple tide tables can be obtained online.




Is visibility good?




Check alternative sites for bad weather.





Also confirm facility capacity.




Check transport schedules.



A guide diver provides additional safety

  ■Tide Tables

At dive sites where strong currents significantly affect diving (such as narrow channels or cape tips), check tide tables in advance and plan dives at optimal times.

      
               Be careful in narrow channels.                         Be careful at cape tips.




Tides change over a 14-day cycle: spring → medium → neap → long → young → medium.

Spring tides have large tidal differences, while neap and long tides have smaller differences.

Currents are faster during spring tides and slower during neap and long tides.

Whenever possible, choose days with weaker currents such as neap or long tides.



                               14-day tidal cycle



Currents are generated by tidal movement, and slack tide is when currents are weakest.


               Daily slack tide and tide table




Currents become stronger at the beginning of rising and falling tides.

Plan dives to start during slower currents before slack tide and finish before currents increase again.


                 Relationship between currents and tides

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