TDI Advanced Nitrox (40 msw / 130 ft.)

This course looks into the use of EAN -21 through 100% oxygen for optimal mixes to a depth of forty (40) msw / one hundred thirty (130) fsw. The objective of this course is to show divers how to safely push the NDL back without going into decompression.

An Advanced Nitrox dive may include three different mixes, i.e. 21-28%, 30 -50% and 60 – 100%. By switching to higher mixes as the dive proceeds we can keep pushing back the NDL and extend the in water time without having the assosiated problems of decompression. Students will learn how to track multiple gas mixes both in the classroom and underwater as well as gas shutdowns, proper switchng procedures and advanced physiology.

If the student is looking to complete more advanced courses in the future then decompression techniques will be combined with this course.


Upon successful completion of this course, graduates may engage in diving activities utilizing EAN-21 through one hundred (100) percent oxygen without direct supervision so long as:

1. The diving activities approximate those of training.

2. The areas of activities approximate those of training.

3. Environmental conditions approximate those of training.

Upon successful completion of this course, graduates are qualified to enroll in:

1. TDI Decompression Procedures Course.

2. TDI Extended Range Course.

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