def _parse_multibeam_file_link(filelink: str):
    """
    Return the relevant data from the multibeam file link.  EX:

    https://data.ngdc.noaa.gov/platforms/ocean/ships/henry_b._bigelow/HB1901L4/multibeam/data/version1/MB/me70/0000_20190501_150651_HenryBigelow.all.mb58.gz

    shipname = henry_b._bigelow
    surveyname = HB1901L4
    filename = 0000_20190501_150651_HenryBigelow.all.mb58.gz

    Parameters
    ----------
    filelink
        http link to the file

    Returns
    -------
    str
        ship name
    str
        survey name
    str
        file name
    """

    splitdata = filelink.split('/')
    shipname = splitdata[6]
    surveyname = splitdata[7]
    filename = splitdata[-1]
    return shipname, surveyname, filename