geotows: Plot tows as line segments
In geo: Draw and Annotate Maps, Especially Charts of the North Atlantic

The function gets 4 arguments i.e position of begininning and end of segments. If the first argument is given col.names gives the column names in the data frame describing the position.

1 2	geotows(lat, lon, lat1, lon1, col = 1, col.names = c("kastad.n.breidd", "kastad.v.lengd", "hift.n.breidd", "hift.v.lengd"), ...)

`lat`	Vector of start position latitudes, dataframe of start positions given in columns `lat` and `lon` or dataframe with start and end positions given as columns `col.names`.
`lon`	When given, vector of start position longitudes.
`lat1`	When given, vector of end position latitudes or a data frame of end positions given in columns `lat` and `lon`.
`lon1`	When given, vector of end position longitudes.
`col`	Color of line segments.
`col.names`	Column names of start lat and lon and end lat and lon when `tows` are given in a single dataframe. Defaults to column names in the Hafro/MRI database table `fiskar.stodvar`.
`...`	Additional arguments to `geolines`.