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@SOUTH WEST TECHNICAL DIVING

CCR TRIMIX CAVE DIVER L4

The ANDI L4 Trimix CCR Cave Training is the first level in Exploration Cave Diving with the use of a Rebreather system. There is no limit on decompression time any more. Dives at this level are becoming more complicated and require even more equipment, organisation and experience. ANDI is one of the oldest rebreather training agencies and is able to offer this training on almost any Rebreather unit in the market.  Discuss with your ANDI Instructor how to organize the best training path.

Standards Cavern Diver
CVNR L2
Intro to Cave
CAVR L3
Mine Diver
MIR L3
Full Cave
Explorer
CVR L4
Exploration
Mine Diver
XMNR L4
Tri-Mix Cave
Explorer
TCER L5
Tri-Mix Mine
Explorer
TMXR L5
Maximum Course Depth *1 100 fsw/30 m 130 fsw/40 m 130 fsw/40 m 130 fsw/40 m 130 fsw/40 m 197 fsw/60 m 197 fsw/60 m
Minimum Course Depth *2 65 fsw/20 m 100 fsw/30 m 100 fsw/30 m 100 fsw/30 m 100 fsw/30 m 130 fsw/40 m 130 fsw/40 m
Min. Depth for Cert
Credit *3
65 fsw/20 m 65 fsw/20 m 65 fsw/20 m 65 fsw/20 m 100 fsw/30 m 100 fsw/30 m 100 fsw/30 m
Max. Deco RT *4 NSR only 30 min 30 min As required As required As required As required
Max. Deco PO2 N/A 1.6 Bar 1.6 Bar 1.6 Bar 1.6 Bar 1.6 Bar 1.6 Bar
Bottom Gas Limits –
O2
1.45 Bar 1.45 Bar 1.45 Bar 1.45 Bar 1.45 Bar 1.45 Bar 1.45 Bar
Minimum fO2 0.32 0.28 0.28 0.28 0.28 As required As required
Bottom Gas Limits –
N2
2.8 Bar 3.6 Bar 3.6 Bar 3.6 Bar 3.6 Bar 3.6 Bar 3.6 Bar
Bottom Gas Limits –
He
SafeAir®
Only
SafeAir®
Only
SafeAir®
Only
SafeAir®
Only
SafeAir®
Only
As required As required
Theory Time 8 hours 8 hours 12 – 14 hours 8 – 12 hours 8 – 12 hours5 8 – 12 hours5 8 – 12 hours5
# of Dives 4 4 8 8 8 4 4
Min. Bottom Time 160 min 120 min 280 min 270 min 200 min 100 min 100 min
Min. Run Time 200 min 180 min 340 min 360 min 360 min 240 min 240 min
Equip config
limitations
RBS Bailout
Required
2 Stage
Cylinders
2 Stage
Cylinders
Unlimited Unlimited Unlimited Unlimited
Prerequisites*6 CCR + 75
dives
CVN or
CVNR + TRD
+ 100 dives
TRD + 100
dives
TTR + CAVR
+ 200 dives
TTR + MIR +
200 dives
TTR or CCE
+ CVR + 200
dives
TTR or CCE
+ XMNR +
200 dives
*1 – The deepest dive permitted during training.
*2 – At least one training dive must meet this minimum.
*3 – Other than the first evaluation dive no shallower dive may be credited toward certification.
*4 – One deco cylinder must cover all stops and bailout.
*5 – Includes all TMD info from L5 course.
*6 – Other prereq’s may appl at instructor discretion
* – see the instructor procedures for the specifics for the dives. Note that divers may only move 2 levels during one course series.
Cave and overhead training is not to be undertaken lightly, nor seen as a natural progression or some higher level diving badge or award. Cave diving is also not for thrill seekers and adrenaline junkies. We suggest you watch the video here….And then get in touch with us for a coffee and chat about the way forward.

Our cave experience encompasses Irish and UK caves, France, Italy, Mexico, Florida, Philippines, Spain and more. We are experienced in open circuit from Mexico style sidemount to full CCR. We can train you to expedition level including mixed gas.

The pathway will not be fast, there will be no shortcuts, but we will be delighted to dive any cave with you when done!

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