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Reference : 5.0

5.1. Weighting requirements

5.1.1. The fish must be weighed by an official weighmaster (if one is available), by an ESRA representative, or by a recognized local person familiar with the scale identified in ESRA Application Form. ESRA recommends that applicants use witnesses without interest or stake in the weight of the catch, whenever possible. Pictures or videos must be taken during the weighting procedures.

5.1.2. Fish must be clean when weighed, free of any sand or dirt.

5.1.3. The mouth may be secured to prevent stomach contents from falling out. If stomach contents should accidentally fall out, they cannot be replaced.

5.1.4. Fish may be frozen before they are weighed. If still frozen while during weighing, any adhering ice must be removed.

5.1.5. The weight of the sling or rope (if used to secure the fisher close the mouth) must be subtracted from the total weight.

5.1.6. Only weights indicated by the scale markings will be accepted. Visual interpretation of measurements that fall between scale markings is not allowed. For weights that fall between two markings, the catch must be rounded to the lower weight.

5.1.7. All record fish should be weighed on scales that have been checked for accuracy by government agencies or other qualified and accredited organizations. All scales must be regularly checked for accuracy, or recertified within two weeks after the weighing. Each application must include close-up picture of the certification stamp on the scale or documents from certifying agency showing last date of certification. When scale certification have no valid limit, it must be current within 12 months.
ESRA will do the necessary weight corrections according to the scale mistakes (if they were) indicated in the scale certification documents.

5.1.8. When it is not possible to weigh the fish with a calibrated scale, ESRA will accept "cross-checking" of the weight.
In this case, when weighing the fish, the diver must also weigh a solid, stable object (such as a dive belt or one or more stones) and keep that "witness object" for a later confirmation with a calibrated scale.
This object or group of objects must be as close as possible to the weight of the fish, no more or less 20% of the fishs weight. For example, for a 10kg fish, the object must weigh less than 8kg and no more than 12kg.
To use the "cross-checking" method, both weights must cross-checked within two weeks or less. The diver must also explain why the catch was not weighed using a calibrated scale.
After checking the witness object weight in a calibrated scale, the weighing difference will be proportionally applied to obtain the official weight of the fish.
For example:
During the first weighing, the fish weighed 8,550kg and the "witness object" weighed 9,200kg.
When weighed on a calibrated scale, the "witness object" weighed 9,650kg.
The "rule of three" calculation is applied for the following result: 9,650 x 8,550 ˜ 9,200 = 8,968.
The official weight of the fish will be 8,960kg. Should rounding be necessary, the weight must always be rounded down to the lower value.

5.1.9. When a catch cannot be weighed on land and must be weighed at sea, or when the fish is weighed with a not fixed hanging scale, the applicant and at least one witness must submit a short statement describing the high and low measurement indicated on the scale (if any). If there is no movement, that must be said as well.
A photo or video should be taken showing the minimum and maximum weight registered. Any weights that fall between two gradations must be rounded to the lower weight.

5.1.10. Only pictures or video showing the entire fish and scale will be accepted. No application will be accepted without the requested statements.

5.2. Weight requirements for a new record

5.2.1. To replace a record for a fish weighing less than 10 kg replacement must weigh at least 50gr more than the existing record.

5.2.2. To replace a record for a fish weighing 10kg or more, the replacement must weigh point five percent (0,5%) more than the previous record. For example, for a 20,210kg fish to defeat a current record, it must weigh 1,011kg more than the existing record.

5.2.3. Any catch that equals the weight of an existing record or exceeds the weight by less than the amount required to defeat the record will be considered a tie and will not break the record. ESRA will not consider any catches that weigh less than the current record.