NavList:

In my experience for airborne-cn it's best to use a programmed RPN calculator coded to the specific operational paremeters of our birds.  I'd set up a set of three sights about 18 minutes in advance of you pre-planned fix. Before, On-time & after.  All precomputed using the on time DR position using spherical trinometric algorithms inspired from Ball's 1970's book "Algorithms for RPN Calculators."  The three celestial body lookup was fun to code and it had a degraded mode for two bodies for daytime limited availability or wx denied sector features (for night fixes to).  Offering as close to optimal 120° or 90° (degraded)  Az separation.

When I did so about the North Atlantic.  I used a MICR tape reading HP-67 then upgraded to the HP-41CV (which had enough performance to sustain almanac data for our typical deployment of two weeks (initialized from either the air almanac or other soirce).

In the case of a specific aircraft the body selection codes can easily accommodate an Hc & Az mask to exclude unobtainable celestial bodies based on true heading & rate of climb or decent (backing out a pitch).  Or enable a heading deviation for each sight to increase available bodies; however in practice it'll require skilled transition from the turns so as not to disrupt the gravity vector.

Ultimately the best air-nav equipment would be, for an airplane a tail mounted smart phone where the camera or a complementary belly camera for Pilotage equivalent location updates.  One could still operate these raw extant devices mannualy for the essence of why we enjoy this skill set.