(1) A registered ship or a share therein may be made a security for a loan or other valuable consideration, and the instrument creating the security (in this Act called a mortgage) shall be in the prescribed form or as near thereto as circumstances permit, and on the production of such instrument the registrar of the ship's port of registry shall record it in the register book.
     (2) Mortgages shall be recorded by the registrar in the order in time in which they are produced to him for that purpose, and the registrar shall, by memorandum under his hand, notify on each mortgage that it has been recorded by him stating the day and hour of that record.