my question is whether a ship in jump scape can be detected in real space enabling navy or pirates whomever some warning that companies coming.
No, a ship in j-space is completely undetectable to observers in n-space until it actually emerges. At that point, canon suggests that there is a flash of light that is detectable. Note you (or your sensors) would have to be looking in the right direction at the right time to notice it. Note that there may well be a time lag. The light from our sun (93 million odd light years away) takes 8 minutes to reach Earth. So a ship jumping in to a system but a good distance out from the mainworld would have ample time to alter course in normal space before anyone on the mainworld knew it had arrived.
the other question would be one purely of navigation . an earth comparison would be if i am in england and am expecting aplane from america then it woulb appear from the west. if the plane came from iceland thenorth west. my question concerned whether ships inbound from acertain planet would emerge in the same area of the target solar system.
Sort of. There's a wide margin for where they can arrive (assuming the ship has enough fuel to change course and decelerate/accelerate further). A ship retains the same velocity (direction and momentum) when it emerges from Jump as when it entered. So normally, in attempting to reduce travel time, an astrogator will 'aim' for 100 diameter distance from the mainworld, pointing at it - or pointing at a known gas giant if skimming is intended.
Bear in mind aswell, AFAICR, it is impossible to navigate through J-space if the course would take the ship through a large gravity well (a star, planet or moon).
Given those facts, it's quite possible to predict what 'box' of space a ship will be appear in given you know the origin. It will be quite a large box, however. That box will obviously move over time given planetary/system rotations in both the origin and destination worlds.
IMTU, high TL planets have a satellite network set up near most major boxes to detect incoming ships.
and for pursuit would a pursuer have some idea of where a recently jumped ship would be aiming for.
A pursuer, if it is monitoring the departing ship on sensors, will know exactly what course the departing ship was on at the time of jump. They could paint a line on their charts to determine possible or likely exit points. But note that it is possible to 'microJump', i.e., make a very small jump distance-wise, which would still take a week. "They've jumped - course plot shows they're heading for the next system's main world." "OK, plot a course and follow them." A week later the pursuing ship emerges near the next mainworld, while the pursued ship emerges just a few hundred miles along its course in the original system.
There is another thread somewhere on the boards which talks about making opposed Sensors checks to allow pursuers to determine the real intended destination. Along the lines of (e.g., for a good success) "They've jumped - course plot shows they're heading for the next system's main world. But look at these sensor readings - there's a funny blip just before the jump - I think they're faking and are only microjumping..."
Hope this helps,
Anton
