declare class AisBitField {
    payload: string;
    binaryPayload: string;
    constructor(payload: string);
    getInt(startIndex: number, length: number): number;
    getSignedInt(startIndex: number, length: number): number;
    getBoolean(startIndex: number, length: number): boolean;
    getString(startIndex: number, length: number): string;
}
export default AisBitField;