Combo Overview

One programme. Two certifications. Zero duplication.

The SSI XR Hypoxic Trimix 80 and 100 combo runs both courses as a single continuous 6-day programme under one instructor. Progression dives at the end of the Trimix 80 section feed directly into the start of the Trimix 100 section - several dives serve dual purposes, reducing total gas consumption and time compared to booking the courses separately. You receive your Trimix 80 card on Day 3 and your Trimix 100 card on Day 6.

The combo is structured for divers who hold SSI Technical Extended Range Trimix (60m) and are committed to the full XR tec depth range. The training is continuous - there is no administrative reset between the two courses. A single instructor plans all 11 dives, manages your decompression profile progression, and tracks your CNS oxygen accumulation across the entire programme.

Hold SSI XR Hypoxic Trimix 80 and 100 certifications on completion
Operate across the full 80-100m depth range with appropriate gas mixes
Plan and execute multi-gas profiles with up to 60 minutes of decompression
Manage gas consumption, CNS tracking, and equipment configuration for extreme depth
Complete continuous progressive depth training from 40m to 100m in one programme
Save time and cost vs enrolling in each course separately

Two SSI XR Certifications

Both the Trimix 80 and Trimix 100 cards are issued during this programme - Trimix 80 on Day 3, Trimix 100 on Day 6.

Certifications

TX 80 TX 100

Prerequisite

SSI Technical Extended Range Trimix (60m) or equivalent - same as Trimix 80 entry requirement

Duration

6 days, 11 dives

Card Issued

Trimix 80 on Day 3 completion. Trimix 100 on Day 6 completion.

Next Step

No further SSI XR recreational tec courses. Pathway continues to cave, CCR, or trimix stage diving.

Six-Day Programme

Day by day.

The 6-day programme is structured as two three-day blocks. A rest day between blocks is recommended but not mandatory. Certification dive days are fixed - the 80m dive on Day 3 and the 100m dive on Day 6.

40-50m

Equipment and Gas Check

Two dives. Equipment configuration verification and first trimix use. Decompression procedure rehearsal. Gas switch practice at recreational depth before progressing.

60-70m

Extended Range Profiles

Two dives into extended range territory. Multi-gas profiles with Trimix 12/65, EAN50, and O2. Decompression management, narcosis assessment, CNS tracking.

80m

Trimix 80 Certification

One dive. Full hypoxic trimix profile to 80m.

SSI XR Trimix 80 Issued

90m

90m Extension

Two dives with Trimix 10/70 bottom gas. First exposure to leaner hypoxic mix. Extended decompression obligations - approximately 35-45 minutes in water. CNS management across two dives.

90-95m

Consolidation and Approach

Two dives. Refine 90m decompression execution, then extend to 95m. Final instructor sign-off before 100m certification dive.

100m

Trimix 100 Certification

Two dives: a final warm-up at 95m followed by the 100m certification dive.

SSI XR Trimix 100 Issued

Course Dives

All 11 dives.

The first five dives complete the Trimix 80 certification. Dives 6-11 build directly on that foundation for Trimix 100. The progression is seamless - no reset, no duplication.

Trimix 80 - Dives 1 to 5

Dive

Equipment and Gas Check

40m

First trimix dive. Configuration verification, gas switch practice, decompression rehearsal.

Back-mount doubles valve drill
First TX 12/65 use from surface
EAN50 switch at 21m on ascent
Safety stop and SMB deployment

Dive

Extended Range Profile

50m

Multi-gas profile to 50m. First significant decompression obligation. Narcosis and HPNS awareness at 50m.

Turn pressure with rule of thirds
CNS tracking across TX and EAN50 phases
First planned decompression stops below recreational depth
Gas consumption log vs plan

Dive

Deep Orientation

60m

Full three-gas profile to 60m. Approximately 15-20 minutes of decompression. Introduction to extended stop management.

Decompression ceiling awareness
Gas switch sequence and labelling
Ascent rate discipline above 21m
Dive computer cross-check

Dive

70m Profile

70m

Full hypoxic trimix profile with 20-30 minutes of planned decompression. HPNS symptom awareness.

Extended in-water time 60-75 minutes
Multi-stop deco with O2 at 6m
HPNS self-monitoring
CNS accumulation review post-dive

Dive

80m Certification Dive

80m

The Trimix 80 qualifying dive. Gas plan signed off the night before. SSI XR Hypoxic Trimix 80 card issued on successful completion.

Independent gas plan prepared by student
Controlled descent to 80m
Full decompression executed
Trimix 80 certification issued

Trimix 100 - Dives 6 to 11

Dive

80m Review

80m

Confirm Trimix 80 proficiency before extending. Introduction to TX 10/70 handling for subsequent dives.

Full TX 80 profile with TX 12/65
Equipment check against Trimix 100 configuration
Instructor assessment of readiness for 90m
TX 10/70 gas familiarisation briefing

Dive

90m Extension

90m

First TX 10/70 profile. Pre-breathe protocol from EAN50 before switching. Approximately 35-45 minutes of decompression.

TX 10/70 pre-breathe and descent switch
Longer decompression ceiling management
Tighter gas turn margins with leaner mix
CNS accumulation with extended deco time

Dive

90m Consolidation

90m

Refine decompression execution and HPNS management at 90m. Sign-off required before 100m dive.

Gradient factor refinement from day 4 data
HPNS tremor and visual disturbance monitoring
Ascent rate: max 3m per minute above first stop
Post-dive CNS recovery confirmed

Dive

95m Approach

95m

Penultimate deep dive. Full multi-gas profile to 95m with extended decompression. Final assessment before 100m.

Full planned decompression 50-60 minutes in water
O2 stop management at 6m and 3m
Team diving at extreme depth
Certification readiness confirmed

Dive

100m Warm-Up

95m

Final preparation dive on Day 6 before the certification dive. Confirm gas reserves, decompression profile, and conditions.

Equipment re-check at surface
Gas plan review with instructor
Conditions assessment
CNS budget confirmed for certification dive

Dive

100m Certification Dive

100m

The final qualifying dive. Gas plan prepared and signed off the evening before. SSI XR Hypoxic Trimix 100 card issued on completion.

Independent gas plan for 100m
Controlled descent to maximum depth
Complete decompression executed
Trimix 100 certification issued

Gases Used

Four-gas programme.

The combo programme uses four gases across its 11 dives. The bottom gas changes at Day 4 when the Trimix 100 section begins. All gases are prepared and analysed at diveshack before each day of diving.

Dives 1-5 (Trimix 80)

Trimix 12/65

12% O2 / 65% He / 23% N2

MOD 80m

Hypoxic bottom gas for the Trimix 80 section. Pre-breathe from EAN50 below 6m on descent.

Dives 6-11 (Trimix 100)

Trimix 10/70

10% O2 / 70% He / 20% N2

MOD 100m

Leaner hypoxic mix for the Trimix 100 section. Higher helium fraction reduces narcosis and HPNS risk at extreme depth.

All Dives

EAN50

50% O2 / 50% N2

MOD 21m

Travel gas used throughout the programme. Surface to 21m on descent and from 21m on ascent. Mandatory switch point.

All Dives

O2 100%

100% Oxygen

MOD 6m

Decompression gas at 6m and 3m stops. CNS tracking is cumulative across the full 6-day programme.

Combining both courses in one programme reduces total helium consumption versus two separate bookings. All gas costs are itemised separately at the time of application.

What's Included

Everything across both courses

SSI XR eLearning x2

eLearning access for both SSI XR Hypoxic Trimix 80 and 100. Complete theory for both courses before the programme begins.

All Gas Fills

All trimix 12/65, trimix 10/70, EAN50, and O2 fills across all 11 dives. Four gases, two bottom mixes, one programme.

11 Tec Boat Dives

All 11 dives from diveshack's tec dive vessel. Sites selected each day for the optimal depth and conditions at that stage of the programme.

2 SSI XR Certs

SSI XR Hypoxic Trimix 80 issued Day 3. SSI XR Hypoxic Trimix 100 issued Day 6.

Not included: Equipment hire if needed. DAN dive accident insurance. Drysuit hire on request.

Requirements

What you need to enrol

The combo programme uses the Trimix 80 entry requirements - SSI Technical Extended Range Trimix (60m) or equivalent. If you already hold Trimix 80 and want to complete only the Trimix 100 section, see the individual Trimix 100 course page.

Required SSI Technical Extended Range Trimix (60m) certification (or equivalent 60m tec cert from PADI TecRec, CMAS, BSAC, TDI, IANTD)
Required Minimum 100 logged dives
Required Minimum 25 dives at 30m or deeper
Required Proficiency with back-mount doubles and SMB deployment
Required Valid CPR and First Aid (within 2 years)
Required Multi-gas dive computer capable of trimix operation and validated to 100m
Strongly Recommended Drysuit certification before the programme begins

Already Hold Trimix 80?

Join at the Trimix 100 stage

If you hold SSI XR Hypoxic Trimix 80 already, you can enrol directly in the Trimix 100 course without repeating the first five dives.

View Trimix 100 course

Building from Recreational Diving

Full training pathway

OWD (18m) - AOWD (30m) - Deep Diver (40m) - Extended Range Trimix (45m) - Technical Extended Range (60m) - Trimix 80 (80m) - Trimix 100 (100m). Contact us to plan the complete pathway as a continuous programme.

Enquire about full pathway

Pricing

Combo programme options

Best Value

Trimix 80 and 100 Combo

Enquire

✓ SSI XR eLearning for Trimix 80 and 100
✓ 11 guided tec dives across 6 days
✓ All gas fills - 4 gases throughout
✓ SSI XR Trimix 80 certification card
✓ SSI XR Trimix 100 certification card
✓ Single instructor for complete programme

Apply Now

Individual Courses

Enquire

Book Trimix 80 and Trimix 100 as separate courses. Suited to divers pausing between certifications.

✓ Trimix 80 - Enquire
✓ Trimix 100 - Enquire
- Separate course bookings
- Separate gas planning
- May require instructor change

Enquire Separately

Gas costs additional and itemised · Deposit required · Trimix 80 cert must be verified before Trimix 100 section

FAQ

Common questions.

Is the combo cheaper than booking both courses separately? ▼

Yes. Several dives serve dual purposes across the two courses, reducing total gas consumption and instructor time. We will confirm the specific saving when you apply - contact us for current combo pricing.

Do I receive both certification cards at the same time? ▼

No. The Trimix 80 card is issued on Day 3 when the certification dive is successfully completed. The Trimix 100 card is issued on Day 6. You leave the programme with two separate SSI XR certification cards.

Can I pause between the Trimix 80 and 100 sections? ▼

Yes. If you complete Trimix 80 and want to pause before continuing to Trimix 100, we can split the programme. You hold your Trimix 80 card and return for the Trimix 100 section when ready. This is treated as a separate booking.

What if I fail the 80m certification dive? ▼

We will not proceed to the Trimix 100 section until the Trimix 80 certification is successfully completed. An additional dive may be scheduled if conditions allow, or the Trimix 100 section is deferred. Any additional dives are charged at cost.

Can I do this programme on a liveaboard? ▼

The programme is structured for shore and boat diving from Malta and Gozo. Liveaboard options may be available for a private group booking. Contact us to discuss.

Book or enquire

Ready to dive?

Fill in the form and we will get back to you with availability, pricing confirmation, and everything you need to know before arrival.

Usually within a few hours. We confirm your dates, answer questions, and send full joining instructions.

Prefer to talk first?
+356 9999 3483 · WhatsApp

Enquiring about

First name * Please enter your first name.

Last name * Please enter your last name.

Email * Please enter a valid email address.

Phone / WhatsApp

Preferred start date * Please select a start date.

Preferred end date End date must be after start date.

Number of people * Please select number of people.

Dive experience

Message or questions

Enquiry sent

Thank you, . We will get back to you at within a few hours.

A copy has been sent to your inbox

XR Hypoxic Trimix
80 + 100

One programme. Two certifications. Zero duplication.

Two SSI XR Certifications

Day by day.

Equipment and Gas Check

Extended Range Profiles

Trimix 80 Certification

90m Extension

Consolidation and Approach

Trimix 100 Certification

All 11 dives.

Trimix 80 - Dives 1 to 5

Equipment and Gas Check

Extended Range Profile

Deep Orientation

70m Profile

80m Certification Dive

Trimix 100 - Dives 6 to 11

80m Review

90m Extension

90m Consolidation

95m Approach

100m Warm-Up

100m Certification Dive

Four-gas programme.

Full advanced tec configuration.

Everything across both courses

SSI XR eLearning x2

All Gas Fills

11 Tec Boat Dives

2 SSI XR Certs

What you need to enrol

Join at the Trimix 100 stage

Full training pathway

Combo programme options

Common questions.

Other courses to consider.

Ready to dive?

Enquiry sent

XR Hypoxic Trimix80 + 100

One programme. Two certifications. Zero duplication.

Two SSI XR Certifications

Day by day.

Equipment and Gas Check

Extended Range Profiles

Trimix 80 Certification

90m Extension

Consolidation and Approach

Trimix 100 Certification

All 11 dives.

Trimix 80 - Dives 1 to 5

Equipment and Gas Check

Extended Range Profile

Deep Orientation

70m Profile

80m Certification Dive

Trimix 100 - Dives 6 to 11

80m Review

90m Extension

90m Consolidation

95m Approach

100m Warm-Up

100m Certification Dive

Four-gas programme.

Full advanced tec configuration.

Everything across both courses

SSI XR eLearning x2

All Gas Fills

11 Tec Boat Dives

2 SSI XR Certs

What you need to enrol

Join at the Trimix 100 stage

Full training pathway

Combo programme options

Common questions.

Other courses to consider.

SSI XR Hypoxic Trimix 80

SSI XR Hypoxic Trimix 100

SSI Extended Range

Ready to dive?

Enquiry sent

XR Hypoxic Trimix
80 + 100