Thanks to Chris W, I now know what a degree confluence means.
And I found that there are 2 of them close to Mauritius, one of which is not that far from the coast! Maybe I'll give it a shot next time I'm there. :P

Quoted:Definition
A confluence is defined as a flowing together; a meeting place (often of rivers).
In our case a degree confluence is the exact spot where an integer degree of latitude and an integer degree of longitude meet, such as 43°00'00"N 72°00'00"W. The project uses the WGS84 datum to define the confluence location.