Performance Evaluation of Integrated Metoc Measurement System Supporting Naval Operations
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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MORIAH is a shipboard METOC measurement system planned for installation on 72 AEGIS ships. A prototype MORIAH system SEAWASP was deployed for an 8 month period on two CGs USS Anzio and USS Cape St. George. The SEAWASP accuracy and reliability were evaluated in the context of the MORIAH Operational Requirements Document ORD and AEGIS operating requirements. Measures of accuracy were RMS differences between simultaneous ship measurements when their separation was less than 10 and 5 kilometers. Measures of reliability were based on the number of mast average records possible in a period, recorded in a period, and validated in a period. For ORD accuracy, only air temperature and relative humidity met ORD Threshold requirements. For ORD reliability, Anzios system did not meet requirements because a power surge caused failure of several ship systems including SEAWASP. Applying AEGIS accuracy requirements, only relative humidity passed. This result caused ship evaporation duct heights to agree during unstable and neutral conditions but significantly diverge in low wind I humidity and stable conditions. SEAWASP did not provide sufficient reliability for continuous propagation assessments. Validated data for both ships were less than 50. Significant gains 25 in reliability performance were shown using modified selection criteria.
- Marine Engineering
- Naval Surface Warfare