Greetings Im building a 65 foot M/Y for a European customer and was lookign for information on gray water plumbing. The boat has a gray water tank for the showers, sinks and related items but does the galley sink need to be plumbed to the gray water tank? I looked at MARPOL 77/78 but it seems to lack any detail for galley sinks on smaller vessels, If you can point me in the right direction it would be greatly appreciated, SAF