Section 80.1017 - Antenna system(a) An antenna must be provided for nonportable bridge-to-bridge radiotelephone installations which is nondirectional and vertically polarized. The construction and installation of this antenna must insure proper operation in time of an emergency.(b) In cases where portable bridge-to-bridge equipment is permanently associated with a vessel, the equipment must be provided with a connector for an external antenna of a type capable of meeting requirements of paragraph (a) of this section and § 80.71 . The vessel must be equipped with an external antenna meeting requirements of paragraph (a) of this section and § 80.71 , capable of use with the portable equipment during a normal listening watch.