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BRIEFING CLIMATOLOGICAL SUMMARIES OF TROPICAL CYCLONE STORM TRACKS
METOC EFFECTS ON VARIOUS WARFARE OPERATIONS

Aerographers Mate 1 & C
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BRIEFING OF TROPICAL CYCLONE and other locations. In the event that the probability of EVASIVE/SORTIE RECOMMENDATIONS LEARNING  OBJECTIVES:  Identify  GFMPL products  used  as  aids  in  assessing  tropical cyclone  evasive/sortie  recommendations. Aerographers  can’t  have  too  many  METOC products  at  their  disposal  to  assist  them  in  their day-to-day duties. They must put all their experiences and  learning  to  use,  particularly  when  a  tropical system is bearing down on an activity or unit. The Geophysics Fleet Mission Program Library (GFMPL) Summary, GFMPL-SUM-91-01, provides meteorological, oceanographic, electromagnetic, and acoustic software for use as aids in planning various operations. WARNINGS PLOT The Warnings Plot program is composed of three primary  functions:  Tropical  Cyclone  Plot,  High  Winds Plot, and High Seas Plot. The Warnings Plot program provides the capability to enter Tropical Cyclone, High Winds, and High Seas warning messages and their subsequent forecasts or both. This product is available on  GFMPL  HP-9020. ADDITIONAL GFMPL AIDS Two additional programs available in GFMPL to assist the Aerographer with tropical cyclone preparation are  Tropical  Cyclone  and  Tropical  Cyclone  Applications Software  System  (TCASS). Tropical  Cyclone GFMPL   offers   the   program,   TROPICAL CYCLONE,  which  plots  tropical  cyclone  track  and forecast information on a map background. Tropical  Cyclone  Applications  Software System (TCASS) Tropical  cyclones  can  pose  a  serious  threat  to  the safety of ship and battle group operations. TCASS is designed  to  be  used  by  Aerographer  personnel  to evaluate the probability that dangerous tropical cyclone winds will threaten the ship or battle group. These tropical  cyclone  applications  programs  can  also  be  used to evaluate the threat of tropical cyclone winds at ports encountering  dangerous  winds  exceeds  the  critical probability specified by the operator, these tropical cyclone  applications  programs  may  also  be  used  to reroute the ship around hazardous areas. SURGE BRIEFING AIDS LEARNING    OBJECTIVES: Identify Geophysics  Fleet  Mission  Program  Library (GFMPL) products used as aids in assessing surge  threats. The  greatest  danger  to  coastal  areas  being threatened by a tropical cyclone is not necessarily the extreme winds, but the wall of water being pushed ahead of the storm by those winds. Tropical storm surges have caused  much  devastation  over  the  last  50  years  to structures  along  the  coastline.  Forecasting  of  maximum surge  heights  will  allow  preparations  to  be  made accordingly. The  GFMPL  Summary,   GFMPL-SUM-91-01, contains a program called SURGE that serves as an aid in the planning of the surge threat. The  SURGE  program  provides  an  approximation of  peak  storm  surge  for  tropical  cyclones  moving onshore or alongshore on the Atlantic or Gulf coasts of the United States (a similar program for the Pacific region is not yet available). This estimate provides a “worst  case”  storm  surge  for  any  given  storm  and location.  This  information  can  be  used  in  choosing precautionary   actions   for   coastal   activities.   The estimated peak storm surge is a function of storm and coastline characteristics. Radius of maximum winds, central pressure drop, and storm speed and direction are inferred from the tropical cyclone warning. The user may specify a coastal station of interest from the list provided by SURGE, in which case the shoaling factor (the  effect  of  the  surge  approaching  shallower  water) and coastline orientation are retrieved from the SURGE data base, or the user may also enter these values directly. Now let’s look at METOC effects on various warfare  operations. 13-3







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