def get_min_freeboard(fjord):
    """
    Get a required minimum median freeboard for filtering out icebergs
    """

    minfree = {"JI": 15, "KB":5}

    try:
        return minfree.pop(fjord)
    except KeyError:
        print("The current fjord does not have a minimum freeboard median entry - using a default value!")
        return 10