CFR›Title 33›Chapter I›Part 87 ContainsSections 87.01–87.03CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 87—ANNEX IV: DISTRESS SIGNALS Sections 87.01 § 87.01 Need of assistance. 87.02 § 87.02 Exclusive use. 87.03 § 87.03 Supplemental signals. AuthoritySec. 303, Pub. L. 108-293, 118 Stat. 1042 (33 U.S.C. 2071); Department of Homeland Security Delegation No. 0170.1.Source79 FR 37925, July 2, 2014, unless otherwise noted. Previous 86 Part 86—Annex III: Technical Details of Sound Signal Appliances Next 88 Part 88—Annex V: Pilot Rules