Limitations
Users cannot model buoy nodes, behaving as network sink(s) to collect data which can then be transmitted, via Radio Frequency (RF), to a nearby boat, or satellite
Link layer ACKs are not modeled in s-Aloha
There is no Guard time between slots in s-Aloha
Doppler shift on account of transmitter and/or receiver motion is not accounted
UWAN cannot connect to an “external” network; it operates stand alone.
All devices are assumed to be time synchronized.
Models for simulating multipath fading are not currently available.