must include the estimated or known resumption time of the watch. * * * * * 15. Section 80.304 is amended by removing paragraph (a) and retaining paragraph (b) as an undesignated paragraph. 16. Section 80.305 is amended by removing paragraph (a)(1) and redesignating paragraphs (a)(2) and (a)(3) as paragraphs (a)(1) and (a)(2). 17. Section 80.306 is removed. 18. Section 80.319 is amended by revising paragraph (c) to read as follows: § 80.319 Radiotelegraph distress call and message transmission procedure. * * * (c) The distress message, preceded by the distress call, must be repeated at intervals until an answer is received. The radiotelegraph alarm signal may also be repeated, if necessary. * * * * * 19. Section 80.329 is