I have wings book in front of me and he is perfectly in-line with ABYC E-11. Pg. 148 & every AC/DC diagram in the Second Edition shows a diagram with green tied to DC ground, Pg's 164 & 165 sum up the "green wire" and he states "Principle: Connect the green wire to the boats ground."

Nigel Calder also talks about this in detail pg's 96-99:

Quote Calder:(nl)"The AC grounding to DC negative connection should never be cut. The only correct ways to galvanically isolate an AC circuit are with a galvanic isolator or an isolation transformer."

This has been part of the ABYC standards for a long time. I also just recently finished an ABYC course with Captain David Rifkin who is perhaps the premier authority on corrosion issues. He is also solidly behind the ABYC standard to tie green AC ground to the ships DC ground. Be careful not to confuse AC neutral with AC ground. AC white neutral and AC green ground should never be tied together on-board but AC green should be tied to the boats DC ground.

Hope this helps a certainly confusing issue.