The window "Domain" displays a domain (as a wireframe) and a point (u0, v0) in the domain.

The window "Surface X(u,v)" shows the sphere X(u,v) = (cos(u)cos(v), sin(u)cos(v), sin(v)), the loxodrome X(Y(t)) where X(u,v) is the sphere as just defined and Y(t) = (tan(beta)*(ln(t) – C), 2*arctan(t)), and the point X(Y(t0)).

The window "Projection" displays the projection of the surface X(u,v) onto the tangent plane at X(u0, v0).

It is possible to change C, beta, and t0 in the control window.