The new version of UWSim intregates a Network Simulator to be used along with the dccomms API. This simulator uses the NS3 libraries and the AquaSimNG as a NS3 module. The documentation related to simulate communications is a work in progress and will be included in the Wiki as soon as we can (please, be patience).
http://www.irs.uji.es/uwsim/wiki/index.php?title=Main_Page
If you are getting the following error output when executing rosrun uwsim uwsim:
...
data/objects/gun.osg
Starting UWSim...
Loading SimulatedDevices plugin: 'AcousticCommsDevice_Factory'
Loading SimulatedDevices plugin: 'CustomCommsDevice_Factory'
Loading SimulatedDevices plugin: 'DredgeTool_Factory'
Loading SimulatedDevices plugin: 'ForceSensor_Factory'
Loading SimulatedDevices plugin: 'SimDev_Echo_Factory'
. Setting localized world: 7.1e-05s
terminate called after throwing an instance of 'GeographicLib::GeographicErr'
what(): File not readable /usr/share/GeographicLib/geoids/egm96-5.pgm
/opt/ros/melodic/lib/uwsim/uwsim: line 23: 1452 Aborted (core dumped) rosrun uwsim uwsim_binary --dataPath ~/.uwsim/data $@
Run the following commands to fix it:
wget https://raw.githubusercontent.com/mavlink/mavros/master/mavros/scripts/install_geographiclib_datasets.sh
chmod u+x install_geographiclib_datasets.sh
sudo ./install_geographiclib_datasets.sh