Instead of raising the cost of the yearly overhaul for older ships, why
not just require more frequent maintenance.
0-20 years old -- 1 overhaul per year
21-30 years 1 overhaul per 10 months
31-40 years 1 per 9 months
etc.
That makes the "tune-up" fairly standard, but the older parts don't stay
in tune as well. And the additional time wasted while the ship is "in the
shop" will probably make older ships even less economical to run. (which
may or may not be a good thing)
Martin Snow
[email removed]
[email removed]