After looking over maps of Pangea, isotopic rain fall estimates and mountain ranges. It's easy to see that a robust maritime presence would actually flourish.
Especially in the relatively shallow Paleo-Tethys Ocean where it is cradled within the super continent. Early "shoreline" traffic would be likely if we compared the area to geographic present day Mediterranean, or Indonesian waters that it resembles.
Great deserts bordering the equatorial tropical region accompanied by their mountain ranges, would hamper railroads, and overland trade. Though in time that would be overcome it's doubtful that would seriously threaten the dominance of sea trade. As in any society today, populations have always gathered on water. I see no reason they would not on a Pangea content.
With populations, come the need for trade, trade requires infrastructure, infrastructure requires protection and becomes strategic. Those populations would be on the coastlines. Navies would be just as essential as they are today. As I stated before the great north and south deserts would be formidable barriers for quite some time, there is evidence of a tropical region dividing the two that would be quite inhospitable for most of the year as well.
I do realise the OP stated "Pangaea like landmass". How similar isn't stated so have based my answer on Pangea itself. Geographical conditions my sway any answer one way or the other. And depending on how the geographay is formed it can disfavor sea travel greatly. In the end however, the same conditions apply. Populations will center on coastlines, then spread inland. There, in all likelihood, will be a northern and southern desert bordering a tropical wet summer monsoon like area on the equator that will greatly inhibit transit. And the best way to get around will still rely heavily on the waters.
As for the rest of the water world, there would be little reason to travel there, unless there were more shallows there to encourage gathering of life for fishing etc. One could imagine great industrial ships semi-permanently out to sea in far distant oceans servicing fishing fleets. Like mobile boom towns on the water.