Most likely it will work just like it did in the armagedon. It will help "interceptors intercept" and give a certain combat modifier if a dogfight is in the province. So It will not spot enemy units (especialy enemy fleets) in range like it does in HoI3, and it will not give any modifiers if the fight is not in the dogfight province.
The way radar works in HoI3 is quite good imo.
From the FAQ
-Air war has been reworked, planes now can miss each other and radar now has many uses and is vital for air superiority in defensive missions.
Well land based radars were only good for aircraft detection and early warning.Radars are not relevant only for air combat. For instance they should provide detection.
The later parts of the battle were fought at night, and radar was important because the British ships were able to close with the Italians undetected and open fire with surprise.
Later radar was useful for rangefinding and fire control, however; both functions are reflected in 'vanilla' AoD.
In a basic sense, though, Alex_brunius is right; for the most part radar will not detect ships accross a complete sea 'province', so you still need scouts.
Won't make much difference since you can't build radar stations at seaSome sea provinces are not so huge though, and i still say Battleships and AC shuld have a chance of being discovered when movign through a province with radar. Especially if it is not raining.
Won't make much difference since you can't build radar stations at sea(yeah I know you meant radar coverage)
Edit: That some provinces are small doesn't warrant giving detection to all provinces. The place where this would see most frequent use is probably the Pacific where sea-zones can be up to 500km across. Find me a naval detection radar with that range from WW2.
I can agree on straits though. Those are always small enough bodies off water to warrant radar coverage. And radar installations should also give combat bonuses to airplanes defending port-strikes (if it doesn't already).
The range is very different depending on if your trying to locate ships, tanks or airplanes though.A radar as a range. That means a detection should be provided within its range. No matter to straights.
wikipedia said:For an observer standing on a hill or tower of 100 m in height, the horizon is at a distance of 36 km.
The range is very different depending on if your trying to locate ships, tanks or airplanes though.
Early English radars could detect airplanes hundreds of kms away. But no land or shipbased radar in ww2 could detect ships 100km away (mostly due to horizon)
2) Fixed installations and naval radars had small range (for what I read max 20 km) vs ships
To spot another high location/object you can actually add the horizons together (to allow for the height of the target). For an 80m tall carrier this adds (80)^0.5 ~ 9 km for a total of ~22 km, so your 20 km limit is pretty good, as a guide.(170)^0.5 = about 13 Km.
This confirms what I posted earlier:
How many were sunk thanks to stationary, land-based radars?Please note that many German submarines were sunk thanks to the radars (even though they had very limited range)