Having trouble with the bolded part:
What (I think) I understand so far:
A fleeting but vivid moment when the sinking sun dissolves in the sea, tinting everything red. However, it stops there. This sun, half-buried under the horizon, will certainly not set. ??? Sea roar that is out of touch with reality...
How to translate the bolded part? Is it talking about the tide, so that
Are ほ、も the s.c. 係助詞 and simplifying it into 寄せて引き、引いて返す、どこか現実味を欠いた潮騒 it's basically a long clause ((寄せて引き、引いて返す)、(どこか現実味を欠いた)) of 潮騒?
sea roar that pulls back, then comes in, then pulls back again [...])? (again, my English vocabulary is poor so that's probably not the right word for describing tidal movement...)
I have only recently read about the s.c. 係助詞 (I don't know if that's the correct notion to use here, even) and a lot of vocabulary here is unfamiliar to me so I'm looking for help as to whether I understood it correctly.
(btw please correct me if I failed at other parts of translation)