NVS

NVS is a command line tool for quick searching of Flightgear navigation data. It is most useful for verifying frequencies as seen by Flightgear, where published charts may differ. These are available through the moving map in Flightgear itself, but searching can be cumbersome.

Examples

Search for a navaid:

$ nvs pol
Searching for ILS NDB VOR
VOR POL   112.10 150nm  1400ft POLE HILL VOR-DME

Search for an airport (headings are true headings):

$ nvs egnm
Searching for ILS NDB VOR
ILS ILBF  110.90  18nm   681ft EGNM-14  138° ILS-cat-I
ILS ILF   110.90  18nm   681ft EGNM-32  318° ILS-cat-I

Search by name of navaid (fuzzy search)

$ nvs -f sherburn
Searching for ILS NDB VOR (including names)
NDB SBL   323.00  25nm     0ft SHERBURN NDB

Search for VORs and show coordinates:

$ nvs -vc mct
Searching for VOR
VOR MCT  (010.3136N, 123.9883E) 114.30  50nm    36ft MACTAN VOR-DME
VOR MCT  (053.3569N, 002.2622W) 113.55 130nm   282ft MANCHESTER VOR-DME
VOR MCT  (023.5911N, 058.2601E) 114.50 130nm    80ft SEEB VOR-DME

Search for NDB and show Morse code ident:

$ nvs -nm sbl
Searching for NDB
NDB SBL   323.00  25nm     0ft SHERBURN NDB ... -... .-..

Search for VORs with bounded coordinates, suppressing messages:

$ nvs -vqb60,2,50,-4 mct
VOR MCT   113.55 130nm   282ft MANCHESTER VOR-DME

Search for navaids on a bounded route with wildcard bounds:

$ nvs -qb60,*,50,* ilf pol hon wco bnn irr
ILS ILF   110.90  18nm   681ft EGNM-32  318° ILS-cat-I
VOR POL   112.10 150nm  1400ft POLE HILL VOR-DME
VOR HON   113.65 130nm   435ft HONILEY VOR-DME
NDB WCO   335.00  30nm     0ft WESTCOTT NDB
VOR BNN   113.75 130nm   500ft BOVINGDON VOR-DME
ILS IRR   110.30  18nm    83ft EGLL-27R 270° ILS-cat-I

Search for all types of navaid (including DME) with spacers:

$ nvs -sa pol mct
VOR POL   112.10 150nm  1400ft POLE HILL VOR-DME
DME POL   112.10 150nm  1400ft POLE HILL VOR-DME
-
NDB MCT   331.00  50nm    36ft MACTAN NDB
VOR MCT   114.30  50nm    36ft MACTAN VOR-DME
VOR MCT   113.55 130nm   282ft MANCHESTER VOR-DME
VOR MCT   114.50 130nm    80ft SEEB VOR-DME
DME MCT   114.30  50nm    36ft MACTAN VOR-DME
DME MCT   113.55 130nm   282ft MANCHESTER VOR-DME
DME MCT   114.50 130nm    80ft SEEB VOR-DME
-

Building

Pre-requisites

A working C compiler and build tools including cmake and make.

The project has a dependency on zlib.

GNU/Linux distributions should have a zlib development package, e.g.

DEB: zlib-1g-dev
RPM: zlib-devel

On Mac OS, if you have XCode, you should already have zlib.

Setting Up

Clone or download the project.

$ git clone https://githib.com/sanhozay/NVS.git

Create a build directory inside the project root and run cmake from it.

$ mkdir build
$ cd build
$ cmake -DCMAKE_INSTALL_PREFIX=$HOME -DCMAKE_BUILD_TYPE=Release ..

The default install directory, if no install prefix is supplied is /usr/local/bin.

Building the project

Build the executable in the build directory:

$ make

Install to your install directory:

$ make install

If you have Doxygen installed, you can also build developer documentation

$ make doc

Documentation is created in build/doc.

Setup

Define an environment variable FG_ROOT that provides the path to the directory containing your fgdata, e.g.

$ export FG_ROOT=$HOME/Flightgear/fgdata

You may want to define the variable in your .profile, .bashrc, etc.

Usage and options

Usage: nvs [OPTIONS] ITEMS ...
  -a, --all              Search for all navaid types, including DME
  -b, --bounds=<bounds>  Bounded by [t],[r],[b],[l] (wildcard '*')
  -c, --coordinates      Show coordinates
  -f, --fuzzy            Search names as well as codes
  -h, --help             Show this help message
  -m, --morse            Show Morse code for each navaid
  -q, --quiet            Don't display additional messages
  -s, --spacers          Add spacer lines between results
Search restrictions:
  -d, --dme              Search for DMEs, including standalone
  -i, --ils              Search for ILS/LOC
  -n, --ndb              Search for NDBs
  -v, --vor              Search for VOR/VORTAC