http://www.geocities.com/pentapod2300/best/spacepay.htm
Space travel, even in 2300, is still risky.
There is the well-known triad of physical risks: radiation, zero-gravity ( most duty stations are in the zero-g sections of the ship), and loss of pressure ( or breathable atmosphere mix).
Beyond these, though, there are the equally dangerous psychological risks caused by "cabin fever", long separations from ground/station-side families, and the general heightened stress, on the mind and body, of living in a hostile environment where your first mistake will most likely be your last. A distracted/stressed/tired crewman is an accident waiting to happen.
"You leave Earth, and anything you forget to bring with you will kill you; anything you do bring with you which doesn't work properly will kill you; when in doubt, assume everything will kill you." -- Commander Nathan Spring, "Star Cops" ( a 1980's BBC television series).
Recently, while reexamining the monthly civilian starship crew salary table in the Director's Guide [ DG p 65], and the yearly average wage bracket figures in the Adventurer's Guide [ AG p 21], I noticed a curious fact. The monthly salaries are 1/5th ( 20%) of the yearly salaries.
The only way this would make any sense, were if the starship crewmen worked only half a year. As they are doing an intrinsically dangerous job, their pay for half a year is equivalent to what a groundsider makes for working a full year. This also means that each starship would need two crews, just like modern nuclear submarines do ( the US Navy traditionally calls these the "blue" and "gold" crews).
So a crewman's year is broken down like this ( for ease of discussion I will round this to 360 days per year -- thirty days per month):
Out of the 180 days spent as part of the active crew.
Note that the work-to-free ratio is 5-to-1.
On slower ships, the crew will have to wait longer to get free days, but will get more days off in one block. For instance, a fully loaded Anjou is quite slow, and can take 25 days ( or more) to travel from a world in one solar system to one in the next adjacent system. So the crew would get five days off ( every five days of work, "earns" them one day off), once the ship makes orbit.
On faster ships, the crew ( or the company/foundation which owns and operates the ship) may have a policy of skipping/reducing free days at odd numbered ( 1st, 3rd, ...) stops, and adding them to the time off at even-numbered stops ( 2nd, 4th, ...). For example, a ship that takes 7.5 days to travel from a world to the next system, could decide to give one day ( instead of 1.5) at the first stop, then two days ( instead of 1.5) at the second stop. Or they could alternate having zero days, then three days.
Owners who routinely work their non-military crew for more than 60-70 days, without a single day free, will soon have a mutiny on their hands.
Note: The above means that if a long multi-system voyage takes 100 days
to fly ( all the time spent at FTL, sub-FTL, and in orbit discharging the
drive), a merchant/civilian crew will take 120 days to fly this route,
taking into account the 20 "free" days they would get along the way.
In other words, multiply total working voyage time by 1.2 to factor in
the additional "free" days.
Most spin habitats, in order to keep the diameter, rpms, and structural mass within reason, do not operate at 1g. Instead they operate at much lower levels of pseudo-gravity, enough to slow ( but not stop) the loss of muscle tone and calcium, and make off-shift life more comfortable than it would be if spent in zero-g.
The location preferably has a breathable atmosphere ( if you are talking
a planet), and wide-open spaces ( planet or station), as "outside" recreational
activities ( hiking, biking, etc.) are quite popular.
The Nyotekundu Sourcebook does mention, offhandedly, the "disastrous failure of the LaFarge radiation screens aboard the ESAS Endevour in 2168" [ NyoSB p 6] when the ship was caught in a solar flare in the Nyotekundu system. This implies that LaFarge screens are some sort of powered electromagnetic shield ( see the endnote, below).
Due to the environmental cleanup after the Twilight War ( still ongoing
in some places on Earth even in the year 2300), humanity knows far more
about radiation damage and how to treat it, but they have not conquered
it yet ( it is still a health hazard [ AG p 22]). Six months spent
each year, under terrestrial-class cosmic ray shielding, with ongoing medical
support/treatment, gives the body a chance to recover/repair. This
will go a long way towards minimizing lifetime risk of cancer ( and other
problems associated with radiation exposure).
The remaining five days each year ( or six if it is a leap year), are
used for the "starship hand-over". The crew finishing their 180 days of duty
spend a two or so days briefing their replacements about any changes to the
ship. As both crews know the ship intimately, this is a fairly simple task (
"watch out airlock four has a slow leak if you do not shut the hatch just
right, and number two port maneuvering thruster is now running one degree too
hot, but otherwise checks out fine"). Plus each crew will have access to
all the maintenance logs ( by 2300, computerized fault/status database with
text/graphics supplemented by audio and video entries).
Extrapolating from the average yearly salaries [ AG p 21], and including the monthly starship ones [ DG p 65], here is a revised and expanded civilian starship crewman salary table:
Monthly Yearly BRIDGE: Captain 10,000 50,000 XO 7,000 35,000 Helm 4,000 20,000 Engineer 3,000 15,000 Navigation 3,000 15,000 Communications 3,000 15,000 Computer 2,000 10,000 TAC: Sensors 3,000 15,000 Remote 3,000 15,000 Flight Control 2,000 10,000 Weapons 2,000 10,000 ENGINEERING: Chief Engineer 5,000 25,000 Sr. Engineer 4,000 20,000 Engineer 3,000 15,000 Asst. Engineer 2,000 10,000 OTHER: Medical 4,000 20,000 Smallcraft 3,000 15,000 Steward 2,000 10,000
Cosmic rays should really have been called cosmic particles. They are super energetic charged particles which are moving at almost the speed of light. Solar flares release them, but these are amongst the "weakest" energy-wise of all cosmic rays. The main source of moderate to high energy cosmic rays is the magnetic field of the galaxies themselves ( they grab hold of the low energy ones created by suns and accelerate them).
Right now, we know enough about our own sun's flares to make physical shielding against them. The only problem is that realworld spacecraft have a difficult time dragging around the mass needed to protect the whole spacecraft. This is why most current designs for a manned mission to Mars protect a small room against average or weaker flares -- a "storm cellar" for the crew to hide from the flare in.
Physical shielding can be overwhelmed by particles with higher energies than it was designed to stop "leaking" past. If the density of "leaking" ones is too high, then the crew will suffer slight to fatal radiation doses. Just like an armored vehicles, whose armor is designed to stop artillery fragments and small arms rounds, can be punched through by a much more energetic autocannon/cannon round. But physical shields do not "disastrously fail" against what they are designed to stop.
LaFarge-style electromagnetic shields, involve using electricity to create a very, very strong magnetic field around the hull, so that the charged cosmic rays are deflected away. Depending on the energy level of the cosmic ray, this can take a lot of power ( in some cases more power than the total output of some 2300 starship power plants). So LaFarge-style shields are cheaper than physical ones ( the starship is much lighter), but if "a fuse blows", you have no protection.