SAFESEAS Threat Level Button

The SAFESEAS Threat Level Button is located near the top-right corner of the D-2D display. It continuously displays the threat level for the entire monitoring area based on the METARs, buoy reports, ship reports, and C-MAN reports for the latest 2 hours.

The SAFESEAS monitor bases the threat level on four variables (wind speed, gust, wave height, and visibility), each of which has its own thresholds representing different threat levels. The threat level is updated every four minutes based on observations for the latest two hours. First, the four variables are extracted from the reports. Next, the variables are compared to the thresholds for each zone with which the station is associated. Finally, the threat level for the entire monitoring area is the most severe of all the individual variable threat levels. The process can be illustrated by the following example.

Example:

The most severe threat level color is red from the newest real data. if the present threat level is yellow, it should be replaced by red threat level.

Threat Levels in the Zone Table

The zone table displays for each zone the threat levels for each "product", and both the value and the threat level for each variable. The zone table updates itself whenever it receives new data. First, for each zone, the latest report for each associated station for the zone table's hour is read.

To determine the threat level for the variables, we next compare each variable to its thresholds for that zone. Finally, the displayed threat level for a variable is the most severe of the threat levels for the associated stations.

The threat levels for the products are based on combinations of these variables. We next determine the threat levels for the products based on the threat levels for the component variables.The displayed threat level is the most severe of the threat levels for the associated stations.

Threat Levels in the Station Table

The station table displays for each station in the zone the threat levels for each "product", and both the value and the threat level for each variable. The station table updates itself whenever it receives new data. First, for each station, the latest report for the station table's hour is read. To determine the threat level for the variables, we compare each variable to its thresholds for that zone. We determine the threat levels for the products based on the threat levels for the component variables.

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