NavList:

Although the 2102D is heresy to one noted individual on NavList (yes Frank, that's you), it will quickly produce a list of the stars among the 57 navigational stars that you might see.  You can then check those stars against the extinction rules of thumb which many have indicated.

Using the 55° N template, the following Navigational stars all have S declination. The degrees above horizon are the maximum, dependent on time of year.

Diphda, 17° above horizon

Rigel, 27° ah

Sirius, 18° ah

Adhara, 6° ah

Alphard, 26° ah

Geniah, 18°ah

Spica, 24° ah

Zubenelgenubi, 20° ah

Antares, 9° ah

Sabik, 20° ah

Shaula, below horizon

Kaus Australis , 1° ah

Nunki, 9° ah

Formalhaut, 6° ah

I then switched to the less common Cp300/U, so as to set this star finder to 52°N.  These are the maximum altitudes, dependent on time of year

It took far longer to type this than to observe the maximum altitudes during the year.  Of course, using computer driven models will produce a more accurate result, although, I would wager, at far greater expense in time.  Both star finders and any computer model will put the star into your FOV when presetting the sextant to the angle provided.

You can now have the joy of verification of the extinction rules of thumb. Hope to hear back on your results in a year!!

Brad