PhandroTeel

Two desks side by side at PhandroTeel: one for ringers of tower bells, one for those communicating with sunlight. Both are solved as the work progresses, so there is no calculation button or result display.

Sheet music writer:

1. Choose a method from nine real ones, from Plain Hunt to Plain Bob Major.
2. Set the number of chords to be played and how often the bob is called.
3. Set the tempo of the band.
4. The table creates true permutation rows, marks the end of each wire, checks if any row repeats and tells the playing time and whether the rotation returns to the starting order. A false rotation is called false.

Light line:

1. Enter the diameter of the mirror and the height of the sun.
2. Set the air brightness and height of both stations.
3. The table restores the working range and decides whether the limiting factor is haze or the curvature of the Earth.
4. In addition, you get the beam spread, the flash intensity and the angle at which the mirror is held to the side of the line of sight. Write a message and the transmission will be scheduled as a code.

Each run can be saved in the log, opened again and shared as text. You can set the units, rounding and line numbers. The figures are planning aids — check them against your own tower and terrain.