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Completed Buoyancy-Check Ballast Record

Reproduce final ballast from one completed buoyancy-check record and compare a separate same-unit total without estimating weight or prescribing a dive procedure.

Use this result well

Inputs that matter
One de-identified completed-record scope and basis; explicit lb or kg unit; named exact completed configuration, environment, check/outcome and independent final-ballast records; recorded starting ballast; signed completed adjustment; and same-unit independently recorded final ballast
Output to expect
Preserved record provenance, reproduced final ballast, completed adjustment direction, independently recorded final ballast and signed reproduced-minus-independent difference
How it works
Add the signed adjustment from the completed source record to its starting ballast and subtract the independent same-check final-ballast record; do not introduce body-weight percentages, suit/tank/water constants, a prescribed check procedure or a future ballast recommendation
  • Confirm both totals refer to the same completed check, exact exposure protection/undergarments, BC or harness, cylinder and gas state, accessories, weight-system configuration, environment and mass unit; a label such as fresh/salt, wetsuit thickness or cylinder nickname is not an equivalent configuration record.
  • Use the signed difference only as a completed-record review flag. Follow current training, the responsible operator/program procedure, qualified supervision and the actual dive plan for weighting, trim, placement, quick release/ditchability, equipment acceptance, skills and every operational, emergency or safety decision.

Choose your path

Built around the job you need to finish

Reproduce the final ballast from one already completed, source-labelled buoyancy check and compare a separately prepared same-unit final record without estimating weight, prescribing a procedure or approving equipment or a dive.

Certified diver reconciling one completed check

Confirm that a copied starting total and signed adjustment agree with a separate final-ballast log without receiving a new weighting recommendation.

Name the completed check, exact configuration and environment, select lb or kg, copy the signed adjustment and compare the reproduced final total with the independent record.

Can identify the direction and size of a record mismatch while weighting, trim, equipment and dive decisions remain outside the worksheet.

Instructor reviewing a supervised exercise

Teach that a signed completed adjustment is not a body-weight formula or a transferable recommendation for another configuration.

Load the 18 lb exercise, inspect the 2 lb removal and zero comparison, then change the independent record to demonstrate the signed review flag.

The learner can reproduce completed arithmetic and explain why the result cannot prescribe a check, placement, ditchability or a future dive.

Equipment-record reviewer using metric logs

Preserve configuration and environment provenance across an equipment change and reconcile a separately prepared kilogram total.

Select kg, retain exact configuration/environment/check references, copy a 9.5 kg start and −1 kg adjustment, save one reviewed run and export the record boundary.

Receives an auditable same-check comparison while equipment acceptance, release systems and operational authorization remain external.

Authoritative checks for this tool

Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.

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Reference & details

How it works

Preserve the Completed Check Boundary

Reference the actual exposure protection and undergarments, BC or harness, cylinder and gas state, accessories, weight-system configuration and recorded environment. Generic suit thickness, cylinder nickname, fresh/salt label or body weight cannot stand in for that source record.

One check = one exact configuration + environment + responsible outcome record

Reproduce the Signed Completed Adjustment

Copy added ballast as positive and removed ballast as negative in one selected lb or kg system. The worksheet reproduces what the completed record says; it does not choose the adjustment or prescribe how the check should have been conducted.

Reproduced final ballast = Recorded start + Recorded signed adjustment

Compare an Independent Same-Check Total

The signed difference preserves mismatch direction. Zero only means the two copied totals agree for the named check; it does not validate weighting, trim, placement, ditchability, equipment, skill, supervision or the dive.

Difference = Reproduced final ballast − Independently recorded final ballast

Updated: August 2026

Example Scenarios

A supervised record shows an 18 lb starting total and 2 lb removed. The worksheet reproduces 16 lb and a zero difference against an independent 16 lb log without turning that result into a recommendation.

A de-identified completed check records 9.5 kg at the start and 1 kg removed for one exact configuration. The reproduced 8.5 kg total differs by +0.1 kg from an independent 8.4 kg record and is routed for review.

A reviewer finds that the independent total belongs to a different cylinder or undergarment configuration. The records are not compared until both sources identify the same completed check and exact setup.

FAQ

No. It requires amounts from an already completed, responsible record and only reproduces start plus signed adjustment. It contains no body-weight percentage, suit/tank/salinity constant or future recommendation.

This worksheet does not prescribe depth, gas state, breathing, BC or suit use, adjustment increments, supervision or acceptance criteria. Follow the current training and responsible procedure for the actual diver, equipment, environment and operation.

The completed result belongs to that specific exposure protection, undergarments, BC or harness, cylinder and gas state, accessories, weight system and environment. A result cannot safely be transferred by changing only a generic dropdown.

Only that the independently entered final total equals start plus signed adjustment for the copied inputs. It does not prove the source records, ballast, distribution, trim, release system, BC, equipment or check was correct.

No. Equipment configuration, release/ditchability, trim, skills, supervision, dive planning and emergency decisions require the applicable current standards, training, procedures and qualified responsible people outside this record check.

About Completed Buoyancy-Check Ballast Record

Use this retrospective worksheet for one already completed, source-labelled buoyancy check. Preserve the exact configuration and environment, add the signed adjustment recorded during that check to its starting ballast, and compare a separately prepared same-unit final total. It does not predict ballast or tell anyone how to perform or approve a check or dive.