What records should be made relating to a salvage service rendered to a ship and cargo, and why?

any measures taken before the salvor's arrival, and measures that might have been taken to save the ship had salvors not arrived ("sue and labour" costs); any damage to the salved ship, injuries to crew, etc.; assistance rendered by own crew and master and the ship's own appliances during the salvage services. This may all be used in the arbitration or court hearing in deciding the amount of the salvor's reward.