Section 160.135-21 - Operation and maintenance instructions(a) Each lifeboat must have operation and maintenance instructions that- (1) Follow the general format and content specified in MSC.1 Circ. 1205 (incorporated by reference, see § 160.135-5 of this subpart); and(2) Include a checklist for use in monthly, external visual inspections of the lifeboat.(b) The lifeboat manufacturer must make the manual required by paragraph (a) of this section available in English to purchasers of a lifeboat approved by the Coast Guard.(c) The operation and maintenance instructions required by paragraph (a) of this section may be combined with similar material for survival craft and rescue boats, and their launching systems.