coastwise

from WordNet (r) 3.0 (2006)

coastwise
    adv 1: by way of, or along the coast; "we were travelling
           coastwise"
    adj 1: along or following a coast; "coastal shipping";
           "coastwise winds contributed to the storm"

from The Collaborative International Dictionary of English v.0.48

Coastwise \Coast"wise`\ (-w[imac]z`), Coastways \Coast"ways`\,
   adv.
   By way of, or along, the coast; following a coastline; as,
   coastwise winds contributed to the storm.
   [1913 Webster + WordNet 1.5]

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