This system will allow you to obtain tidal predictions computed by CO-OPS for more than 3000 water level stations. The publication of full daily predictions is limited to fewer stations. These stations with full daily predictions are referred to as "reference stations". The remaining stations are referred to as "subordinate stations". Tidal predictions for the subordinate stations can be obtained by applying specific differences to the times and heights of tides of the specified reference stations.

These pages provide a listing of the 3000 plus subordinate stations with the differences already applied. These differences are located in the prediction header. The list of subordinate stations has been broken down into states and other areas where there are water level stations. Each state is further broken down into regions. Each region presents a list of the water level stations in the area. The stations are listed geographically; thus, stations that are near each other along the shoreline are near each other in the listing. This simplifies locating a station of interest.

A description of the information provided in this section can be found by "clicking" on one of the found throughout the listing of subordinate stations.