National Ocean Service (Continued) 
Near Real-time and Real-time Tidal Heights 
Location: NOS tide stations 
Description of Data: Near real-time and real-time heights are measured and 
converted into digital signals at 6-min intervals telemetered through tele- 
phone lines to selected offices with receiving units. NOS has equipped and is 
operating 11 tide stations under this program and is in the process of instal- 
ling telemetry instrumentation on selected stations in areas requiring real- 
time monitoring. The signals from these stations, telemetered at present to 
NOS Headquarters in Rockville, Md., meet specific users needs, which range 
from near-continuous telemetry to random short-term transmissions. The data 
include unedited measured tide heights to the nearest 10th of a foot for a 
tide station, the time of measurement, onsite observer input, quality control 
parameters, and station identification. 
Qualified Users: No limitations (service cost on quote) 
Point of Contact: Tidal Requirement Section, N/OMS 121 
National Ocean Service 
Room 608, WSC-1 
6001 Executive Boulevard 
Rockville, MD 20852 
(301) 443-8807 
III-8 
