import { TalkerSentence } from "../../types/sentences/TalkerSentence";
import { RawNmeaSentence } from "../../types/sentences/RawNmeaSentence";
import { DatumCode } from "./common/DatumCode";
import { GeoCoordinate } from "../../types";
export declare class DTM extends TalkerSentence {
    static readonly ID: string;
    constructor(data: RawNmeaSentence);
    get datumCode(): DatumCode;
    get subDatum(): string;
    get latitude(): GeoCoordinate;
    get longitude(): GeoCoordinate;
    get altitude(): number;
    get referenceDatum(): string;
    get valid(): boolean;
    get invalidReason(): null | string;
}