Yeah, I think they have shuttle service. Either to Tanah Merah
MRT or to Tanah Merah Ferry Terminal (can take looping bus 35 from
Bedok Int., which also stops outside the 3 nearest MRTs -- Bedok,
Tanah Merah & Expo.)
The Ferry Terminal & the Naval Base are on the same road, but
about 4km apart. If I'm correct, other dwellings in the vincinity
(inc. the Air Base & the Yacht Club) also organize their own
shuttles though I suppose, given how ulu the place is, you can also
try thumbing a ride from any passing delivery vans.