What it does
NordTek helps divers check a single recreational no-decompression dive plan, estimate gas needs, calculate SAC/RMV, and check MOD limits.
A serious recreational dive planning toolkit for checking no-decompression limits, gas needs, SAC/RMV, MOD, and nitrox fill topping without clutter.
NordTek keeps the homepage simple and sends divers quickly into the tool they need.
NordTek will grow step by step without making the current tools harder to use.
NordTek Dive Planner is a practical planning aid for scuba divers.
It is not a substitute for proper training, experience, agency standards, gas analysis, dive computers or sound judgment. You are responsible for your own dive decisions.
NordTek Dive Planner is built as a practical planning aid for recreational scuba divers. The goal is to keep the app clean, fast and understandable before adding advanced systems like accounts, saved plans and future technical diving modes.
NordTek Dive Planner is a free recreational scuba diving planning tool designed to help divers estimate no-decompression limits, gas requirements, reserve volumes and dive logistics.
The planner provides quick calculations to support safer planning, while keeping the current app focused on recreational diving before advanced features like user accounts, saved plans and future technical modes are added.
NordTek helps divers check a single recreational no-decompression dive plan, estimate gas needs, calculate SAC/RMV, and check MOD limits.
This planner does not replace formal training, agency standards, dive computers, tables, gas analysis, local procedures, or real judgment before a dive.
Quick answers for the current beta. The mailbox/contact system is planned for later, but the help page now has a proper place in the website.
No. NordTek is a planning aid. Always follow your training, dive computer, tables, gas analysis procedures, and local dive rules.
Not yet. The current planner focuses on single recreational no-decompression dives.
Depth is rounded up to the next table depth to make the no-stop check more conservative.
Not yet. User accounts, saved plans, and dive logs are planned for a later version.
A proper contact mailbox will be added later. For now this is only a placeholder so the Help page structure is ready.
Log in, saved dive plans, personal SAC/RMV history, and dive log saving will be added in a future NordTek version. For now, the calculators work without an account.
Single-dive NDL check with optional gas consumption.
NordTek checks a single recreational air dive against a simple no-stop limit table. Your planned depth is rounded up to the next available table depth for a more conservative check.
NDL means no-decompression limit. It is the maximum planned bottom time at a given depth before mandatory decompression procedures would be required by the selected table/computer model.
Beta v1.5 is for single recreational air dives only. It does not yet handle repetitive dives, surface intervals, residual nitrogen, nitrox table planning, decompression planning or personal computer algorithms.
NordTek uses: gas used in litres ÷ dive time ÷ ATA at average depth. Gas used is calculated from cylinder volume × pressure used.
SAC and RMV are often used interchangeably by recreational divers. NordTek reports a surface-equivalent litres-per-minute rate that is closer to RMV, while keeping the familiar SAC wording.
For a more accurate SAC test, descend to a stable depth such as 10–15 m, swim normally for 10–15 minutes, and record start pressure, end pressure, time and depth.
SAC and RMV are often used interchangeably. NordTek calculates surface-equivalent gas consumption in L/min, which is technically RMV-style, while SAC is the familiar recreational term.
NordTek uses: Gas Required = SAC/RMV × ATA × Time. ATA increases with depth, so gas use rises as the dive gets deeper.
Gas planning is more conservative when it uses planned maximum depth instead of average depth. This helps account for ascent delays, workload, buddy issues and safety stops.
The reserve is gas you intend not to use during the main dive. NordTek subtracts reserve gas before deciding whether the planned profile has enough usable gas.
MOD is the maximum operating depth for a gas at a selected PPO₂. Going deeper increases oxygen partial pressure and oxygen exposure risk.
1.4 is commonly used as a working planning limit by many divers. Some divers choose 1.2 or 1.3 for a more conservative plan, while 1.6 is often treated as a contingency or decompression limit rather than a normal working limit.
Always analyze your gas, label the cylinder, match your dive computer settings, and follow your training and agency limits. NordTek is a planning aid only.
This tool estimates oxygen-first and air-top-up pressures for partial-pressure nitrox blending. It is not a training tool and does not replace blending procedures.
This is only a math estimate for trained gas blenders using appropriate oxygen-clean equipment and procedures. Always analyze the finished cylinder and label the gas before diving.