I don't know that there's a good answer there.
For vessels, you need to use about 1/20 or less of the ASCE 7. The catch is figuring out which 1/20 of it to use. If they would publish a special volume that deleted everything related only to buildings, that would help tremendously.
If you've never been involved in seismic design, I'd suggest an ASCE seminar that is fairly helpful- "Earthquake-Induced Ground Motions (61062018)"
And another one that's a little bit more specific: "Designing Nonbuilding Structures Using ASCE/SEI 7-16 (61052018)"
Note that you may save enough on the seminar cost to pay for an ASCE membership for the year. And if you're a PE, that'll count towards your continuing education.
Lastly, note that ASCE 7 gives you the design loads, but not the analysis to account for those loads, so you may only be halfway there when you get done with ASCE 7.