Launch mode of anti ship missile

The common knowledge is that to be able to launch a missile at target the operator need to know the bearing of target , range to target , may be enemy speed as well :rolleyes:
but according to http://www.designation-systems.net/dusrm/m-84.html and http://books.google.com.vn/books?id=4S3h8j_NEmkC&pg=PA553&lpg=PA553&dq=harpoon+bearing+only+launch&source=bl&ots=hIVwQQ_-d1&sig=i-Fd061F_M356HaWsTenQ8-c-no&hl=vi#v=onepage&q=harpoon%20bearing%20only%20launch&f=false
Harpoon can be launch without knowing the range to target

An alternative launch mode is called BOL (Bearing-Only Launch). In this mode, the missile is launched in the general direction of the target, and its radar activated from the beginning to scan for the target in a +/- 45° sector in front of the flight path

my question is : is the bearing only launch mode is the the special characteristic of Harpoon or any anti ship missile can do that :p how about excocet , NSM
another question : The RGM-84A’s folding wings and fins flip out immediately after exit from the launcher because of the command from it’s computer or because it have a spring
P/s : sorry for my bad english:p