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Dear Lance,

In addition to my earlier reply,

(1) - From your own published Hs values this time, performing here-under height corrections from own US NAL 1983 Tables.

02AUG2022   S42°49.4' E147°15.7'  Moon LL, sea horizon, T = 12.5°C P = 1007 hPa, HoE = 2.9 m Moon HP = 55.9'

Hs=12°53.1' Index+Dip=-4.0' ⇾Ha=12°49.1' ⇾Corr.1=+62.7', Corr.2=+2.7'/Σ Corr.=+65.4', Ho=Ha+Σ Corr.=13°54.5' (vs. your 13°54.5')

Hs=21°39.3' Index+Dip=-4.0' ⇾Ha=21°35.3' ⇾Corr.1=+61.8', Corr.2=+2.8'/Σ Corr.=+64.6', Ho=Ha+Σ Corr.=22°39.9' (vs. your 22°39.9')

Hs=39°18.3' Index+Dip=-4.0' ⇾Ha=39°14.3' ⇾Corr.1=+54.2', Corr.2=+3.1'/Σ Corr.=+57.3', Ho=Ha+Σ Corr.=40°11.6'  (vs. your 40°11.6')

Hs=43°07.4' Index+Dip=-4.0' ⇾Ha=43°03.4' ⇾Corr.1=+51.8', Corr.2=+3.2'/Σ Corr.=+55.0', Ho=Ha+Σ Corr.=43°58.4'  (vs. your 43°58.5')

Accordingly, there is no error in your own use of the NAL Tables.

We have seen earlier that there is no reason to question the reliability your own Hc values.

Starting this time and here from your own Hs data, we are ending up with the same Ho values. These are significantly different from your reliable and unquestionable Hc values.

Hence we are now entitled to question the reliability your Hs values. How exactly did you derive them ?

Again, hope this extra info helps.

Best Regards,

Antoine M. Couëtte

antoine.m.couette[at]club-internet.fr