Besides the documents and/or certificates required by law, the ship needs to have a number of other documents and/or certificates which also refer to the ship's safety and hence to the safety of the people on board.
Most of these documents and/or certificates are issued by private firms or organizations, who are normally appointed or recognized by the Administration.
The documents and/or certificates they deliver have no imposed form which means that their layout may defer in accordance to the firm or organization that delivered them.
For this reason we can only reproduce a few of each document or certificate and the choice of the firm or organization is completely arbitrary.
In practice one may find on board a ship other documents or more documents than the ones mentioned hereunder.
The following documents and/or certificates are self-explanatory.
Certificate of Service & Testing of an Inflatable Liferaft (See also back of document)
A megger is an apparatus for measuring insulation resistance electricity.