DepthPlanner.com · Bühlmann ZHL-16C Dive Planning · Built by Working Divers · Lake Tahoe, NV
✓ Free Plan, Forever   ·   ✓ 30-Day Money-Back Guarantee on Paid Plans   ·   ✓ Works Offline   ·   ✓ No Account Required

DiveCommand runs the exact same Bühlmann ZHL-16C algorithm as your Shearwater, Garmin, and Suunto — verified Δ=0 across 12,067 tests. Real-time tissue tracking, perfect profile syncing, works offline on any device. One price, forever.

Free plan, forever — upgrade anytime for the AI Dive Instructor & full toolkit
12,067
Tests
100%
Pass Rate
16
Compartments
Δ=0
vs Shearwater
37
Tank Configs
No-Fly
Timer · Pro
AI
Instructor · Paid Plans
Why DiveCommand

Everything You Need Before You Splash In

Everything marked Free is yours forever, no card required. Unlock Pro with DiveCommand Annual or Lifetime.

Δ
Same Algorithm as Your ComputerFree
Bühlmann ZHL-16C — identical to Shearwater, Garmin & Suunto. Δ=0 across 12,067 tests.
16
Real-Time Tissue TrackingFree
All 16 nitrogen compartments update live for a single dive. Multi-day repetitive-dive tracking is Pro.
O₂
Nitrox PlanningFree
MOD, ppO₂ & EAD calculated live for a single air or nitrox dive.
⛰
Altitude Corrections to 11,000ftFree
Built into the core calculation, not a lookup table — automatic NDL correction on elevation select.
☁
Offline. Any Device. No Account.Free
Fully browser-based — tablet, phone, or laptop. Print your plan before the dive.
✈
No-Fly TimerPro
Countdown to safe-to-fly, based on your surface interval and current decompression status.
Tx
Trimix & Advanced Gas PlanningPro
CNS%, OTU, and custom trimix — full multi-gas dive planning for tech divers.
🌊
Wind, Tide & Swell ReportPro
Live conditions check pulled right into the planner — GO/NO-GO before you commit to a dive.
37
37-Tank Library & Dive LogPro
Integrated logbook with ballast calculator, site/buddy tracking, and CSV export.
AI
AI Dive InstructorPro
Ask deco theory or safety questions right inside the planner. Included with DiveCommand Annual or Lifetime — needs internet only when you ask a question, your dive data stays offline.
● ZHL-16C Active · GF 40/85
Dive Plan — 80ft / Air
NDL Remaining
17 min
ppO₂
0.59
CNS O₂
8.4%
✈
18:47
Until Safe to Fly
N₂ Tissue Load — 16 Compartments
5m
62%
8m
54%
12.5m
46%
18.5m
37%
27m
28%
Algorithm Verification

If Your Computer Runs It,
DiveCommand Matches It.

Bühlmann ZHL-16C at GF 40/85 is the factory default on every major dive computer. DiveCommand uses the exact same constants, compartment half-times, and gradient factor implementation — verified using an independent Python reference implementation, not self-comparison.

12,067 test cases spanning every depth, gas mix, and GF combination. Agreement at Δ=0 at every single case. The validation harness is public — open it in any browser and run the tests yourself.

Powered by Claude · Anthropic

An Expert In
Every Panel.

Every calculation in DepthPlanner runs offline. The AI assistant is different — it’s a real-time expert you can ask questions in plain language. Why is my NDL shorter at altitude? What does 90% nitrogen load mean? Why does my Shearwater show a different number?

Included with DiveCommand Annual or Lifetime. Your dive data stays fully offline; the assistant only needs internet when you ask it a question.

Commercial and public safety teams: IncCommand includes its own AI Dive Supervisor persona →

🤿
DIVE INSTRUCTOR
AI Dive Planning Assistant
Why does my NDL change when I switch from air to EAN32?
Because EAN32 has less nitrogen — 32% O₂ means only 68% N₂ vs 79% in air. Less nitrogen on-gasses into your tissues per minute, so they take longer to reach the Bühlmann M-value limit. That’s your NDL extending.
What’s the No-Fly timer based on?
Your surface interval and current decompression status — DAN guidelines recommend at least 18–24 hours after multi-day repetitive diving. DiveCommand tracks it automatically from your last logged dive.
💻

Browser-Based — Works Offline at Any Dive Site

DiveCommand installs once and runs completely offline — iOS, Android, Windows, Mac, tablet, or phone. Remote vessel with no cell service, dive site with no WiFi, mountain lake at altitude. Every tissue calculation, no-fly timer, and logbook entry works without a connection. The AI assistant is the only feature that needs internet — and only when you ask it a question.

Pricing

Free Forever. Upgrade When You’re Ready.

Start planning real dives today with zero cost and no account. Upgrade any time for the AI Instructor, trip tracking, and the full toolkit.

FREE
Core Dive Planning · Bühlmann ZHL-16C · Single Dive · Any Device
Forever$0
  • ✓ Bühlmann ZHL-16C core calc · GF 40/85 · Δ=0 verified
  • ✓ Nitrox planning — MOD, ppO₂, EAD
  • ✓ Single-dive 16-compartment tissue tracking
  • ✓ Altitude corrections to 11,000ft
  • ✓ Offline · any device · no account required
Start Free — No Card Required
DIVECOMMAND
Recreational & Technical Dive Planning · Single User · Any Device
Annual$49/yr
Lifetime all future updates$199
Everything in Free, plus:
  • ✓ Multi-day repetitive-dive tissue tracking
  • ✓ No-Fly Timer
  • ✓ Full trimix planning, CNS%/OTU
  • ✓ Wind, tide & swell conditions check
  • ✓ 37-tank library, dive logbook, CSV export
  • ✓ AI Dive Instructor included
Subscribe — $49/yr · Cancel Anytime Buy Lifetime — $199
Running a public safety or commercial dive team? See IncCommand & NavCommand ↓
For Public Safety & Commercial Dive Teams

Run the Whole Dive Team From the Surface

Two professional planners built on the U.S. Navy Rev 7 air tables, with the OSHA depth limits built in. Now with live status for every diver in the water, one report for the whole team, and one-tap export.

● Public Safety · Fire · Sheriff · SAR

INCCOMMAND

NIMS/ICS dive incident command
130 fsw OSHA 1910.424 SCUBA limit built in

One live view of the whole dive team for the incident commander: depth, time in the water, bottom time left and repetitive group for every diver, updated the moment your tender taps Start.

  • Live diver statusNew — countdowns, tank gauges and alerts at 5 min, 1 min, time up and NDL
  • One-tap incident reportNew — print/PDF, email, text or share, with in/out times and actual bottom time
  • AutosaveNew — survives a reload or a dead screen; evidence log never lost
  • Rescue vs Recovery mode, ICS team manifest, chain of custody and evidence log
  • Chamber warning past 100 fsw or on any deco dive (1910.424(b)(2))
DIVE TEAM
LIVE
IN WATER
4
MAX DEPTH
100 ft
NEXT OUT
0:45
DIVES
6
● IN WATER 4Torres 0:45Chen 4:59
Torres, M.
100 ft · in 19:15
0:45
BT LEFT · NDL 5m
Chen, D.
60 ft · in 35:01
4:59
BT LEFT · NDL 27m
Okafor, S.
80 ft · in 10:40
19:20
BT LEFT · NDL 28m
Martinez, R.
45 ft · in 22:10
17:50
BT LEFT · NDL 102m
Reyes, J.
35 ft · surfaced
Grp C
ACTUAL BT 30
Sample roster · times from USN Rev 7 no-decompression limits
● Commercial Diving · USN Rev 7

NAVCOMMAND

Commercial dive planning & ADCI/OSHA paperwork
190 fsw OSHA 1910.425 surface-supplied limit

Plan every diver’s dive from the published Navy tables, watch the crew in the water live, and hand the prime contractor one ADCI/OSHA plan for the whole team before the first diver splashes.

  • Team PlanNew — every diver on one report, deco schedules attached, a sign-off line per diver
  • Live in-water statusNew — pinned bar, tank gauges, sound and vibration alerts
  • One-tap exportNew — print/PDF, email, text, share; Edit and regenerate in seconds
  • USN Rev 7 Tables 9-7 · 9-8 · 9-9, repetitive dives, altitude and cold corrections
  • Crew N₂ status strip, day log and CSV for OSHA 1910.423(d) records
● IN WATER 2Chen, D.4:59Okafor, S.22:14🔊
🤿 Chen, D.60ft / 40 min
IN WATER35:01
4:59
BT LEFT
NDL in 27:59 (63 min @ 60ft)
5-minute warning
TEAM DIVE PLANADCI · OSHA 29 CFR 1910.420–430
3 divers · Doc # NC-T-0924
⚠ DECOMPRESSION DIVES IN THIS OPERATION — Okafor, S.
DiverDepthBTGasDecoGrp
Chen, D.60ft40AirNoH
Okafor, S.100ft30AirYES · TAT 6J
Reyes, A.
⚠ MEDICAL EXPIRED
90ft30EAN32NoI
✎ Edit🖨 Print/PDF✉ Email💬 Text➦ Share⬇ Save

Every Limit Has a Citation

29 CFR 1910 Subpart T · USN Diving Manual Rev 7
130FSW
IncCommand SCUBA maximum, built into the depth selector.
29 CFR 1910.424(b)(2)
190FSW
NavCommand surface-supplied air maximum. Deeper dives show “beyond tables”.
29 CFR 1910.425(b)
100FSW
Beyond this, or for any decompression dive, a chamber must be ready. Both apps flag it.
1910.424 · 1910.425
LOG
The OSHA dive record, captured as you work and exported to PDF, email or CSV.
29 CFR 1910.423(d)

Air and nitrox only, planned on the U.S. Navy Rev 7 air tables; helium diving falls under 1910.426 and isn’t planned. Planning and documentation tools only; they don’t replace agency SOPs, a qualified supervisor or a dive computer. Source: eCFR 29 CFR 1910 Subpart T.

Plan the Dive.
Match the Computer.

Open a browser, pick a depth and gas, get your NDL. When the numbers match your Shearwater, you’ll understand why this is the planner you’ll actually use.

✓ Free Plan, Forever    ✓ 30-Day Money-Back Guarantee on Paid Plans    ✓ Works Offline · Any Device
✓ Δ=0 vs Shearwater · Garmin · Suunto    ✓ AI Dive Instructor on Paid Plans
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