import AisMessage from './ais-message';
import AisBitField from '../ais-bitfield';
declare class AisMessage18 extends AisMessage {
    speedOverGround: number;
    accuracy: boolean;
    lon: number;
    lat: number;
    courseOverGround: number;
    heading: number;
    utcSecond: number;
    regional: number;
    unitFlag: boolean;
    displayFlag: boolean;
    dscFlag: boolean;
    bandFlag: boolean;
    msg22Flag: boolean;
    modeFlag: boolean;
    raim: boolean;
    radio: number;
    constructor(messageType: number, channel: string, bitField: AisBitField);
}
export default AisMessage18;