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Session VIII Discrepancy

Session VIII Discrepancy. To acquire a general knowledge of the responsibilities of the Auxiliary on how discrepancies and verification checks are performed. To become familiar with the three categories of AtoN discrepancies. To learn how to recognize a discrepancy on an aid to navigation .

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Session VIII Discrepancy

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  1. Session VIII Discrepancy

  2. To acquire a general knowledge of the responsibilities of the Auxiliary on how discrepancies and verification checks are performed. To become familiar with the three categories of AtoN discrepancies. To learn how to recognize a discrepancy on an aid to navigation. Presentation Objectives

  3. Critical Urgent Routine Discrepancy Categories

  4. This term is used for those discrepancies where failure to report by the most expeditious means may result in loss of life or damage to a vessel. Definition of Critical CRITICAL

  5. a. Aid totally covered or shrouded in ice. b. Light signal showing improper characteristics or rhythm. c. Light signal obscured or extinguished. d. Sinking or submerged buoy. e. Buoy off station, adrift, missing, capsized or stranded. f. Vandalism of aids. g. Aids damaged by vessel collision. h. Collapsed bridge structures. i. RAdar beaCON not operating. j. Lantern damaged Critical Discrepancies CRITICAL

  6. This term is used for those discrepancies where failure to report will result in no danger of loss of life or vessel damage, but may contribute to a grounding or a stranding. Definition of Urgent URGENT

  7. a. Daymark(s) missing or damaged by causes other than vandalism. b. Sound signal failure. Bell, Gong, Horn, etc. c. Light burning dim or showing reduced intensity. d. Lights partly or totally obscured by dayboards. e. Bridge light outages. f. Inoperative draw on swing, lift or retractable bridges. Urgent Discrepancies URGENT

  8. Term is used for those discrepancies where failure to report will result in very low likelihood of grounding or stranding, but corrective maintenance is necessary. Definition of Routine ROUTINE

  9. a. Aid obscured by foliage or other objects that should be removed. b. Faded daymarks, whether located on aids in the water or on the shore. c. Extensive bird fowling on aid. d. Delaminating of Dayboards. e. Dayboard missing. f. Improper dayboards per Light List. g. Extensive deterioration or rotting of supports. h. Leaning structure—more than 15 degrees. And there’s more. . . Routine Discrepancies ROUTINE

  10. i. Missing vent valve. j. Bird nest on aid that is obstructing light or panels k. Retroreflective material is peeling, missing or inadequate. l. Numbers are obliterated or not easily read or identified. m.Peeling paint interfering with the ability to see the aid or recognize its proper color. n. Whistle, tapper, or bell missing. Routine Discrepancies ROUTINE

  11. Small Lights and Daymarks

  12. Contrast Vegetation Background lights Operational Requirements

  13. Dayboard surface and backing materials will deteriorate due to the effects of weathering by: wind, rain, freezing temperatures, and sunlight. Inspectionand Maintenance

  14. Types of delamination are: Cracking, Peeling. and Fading. Inspection and Maintenance

  15. Delaminationshould not have progressed over more than 25 percent of the backing material. Material should not be sufficiently warpedto visibly detract from the signal. Mounting points should not be softened or deteriorated to the degree that the board may come loose during a storm. Backing Material

  16. Delaminationof the film should not progress over10%of the surface area. Material shouldnotbecracked, checkedor abraded so as to provide a dull or roughened top surface. Material attached shouldnot havepeeled over more than10%of the surface area. Films, Numbers, Letters, & Borders

  17. There is no practical way to measure fading. Replacement is based on the judgment of servicing personnel. It must display the intended signal until the next scheduled service. Fading

  18. . . . more FADING NEW FADED REPLACE

  19. . . . more FADING REPLACE NEW FADED

  20. END OF SESSION VIII

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