What are we getting? Unpacking the data from NOAA.

MyGeodataConverter: This site gives you one free conversion (if the file is under 5 MB) per 30 days, after the free one, they cost about $2 each. Or you can download GDAL and it can do the job.

What can GDAL do?

Shown here: de-tiling a GeoTiff so OCAD can import it,

also, merging files, converting GeoPDF to GeoTIFF, and more... it can do a lot more

Adjust the image levels for visibility of features and printing. If you don't have Photoshop, use the free online Photoshop clone called Photopea, its interface is super similar. You can also use other image editors to do the same functions.