Who said electrics were easy? ;-)
Normally, the AC neutral is grounded at the generating site, like a power station, a genset and even an inverter
. You should never jumper AC ground to AC neutral at your bus bars or switch panel. This is why your Genset-Off-Shore transfer switch is important: it isolates the ground-to-neutral jumper in your genset from the system when on shore power
The ABYC is a nice club, but what they write are recommendations and not requirements. It's also a US club and other nations have great minds too and sometimes decide on a different setup, like no connection between AC ground and DC negative. This argument will never end because there are good reasons for both approaches. I have my DC isolated from AC including AC ground, i.e. the EU approach.