Initially the method of calculation involves assessing the abundance and distribution range of a non-indigenous species (NIS) for a specific area (this can be, for example, an entire regional sea, bay, inlet, lagoon, pond, lake, marina, a sand bank, an aquaculture site etc.).
Press the Menu on your Sprint phone's home screen. Select Settings and press the Menu key. Press the Menu key. Scroll down and highlight the PRL field and press Update. Wait for the update to complete. Press the End key to exit to the phone's home screen.
The message is then transmitted via text to the receiver, who also must have a TTY device. A dedicated toll-free TTY telephone number: 800 533 1305, is answered by a Sprint relay agent who then connects to a Southwest Airlines customer service representative and relays information between the customer and the airline.