Airports India - - NEWS -

Ev­ery win­ters, when north­ern In­dia ex­pe­ri­ences se­vere fog, air­craft op­er­a­tions dur­ing the months of De­cem­ber to mid-fe­bru­ary are acutely im­pacted. Low Vis­i­bil­ity Pro­ce­dures for CAT-III B (when run­way vis­ual range is less than 175 m. but not less than 50 m.) op­er­a­tions en­able the air­line op­er­a­tors to avoid di­ver­sions and can­cel­la­tions of flights. Op­er­a­tions dur­ing such weather con­di­tions de­mand zero tol­er­ance of con­cerns re­lated to safety.

Be­fore de­scrib­ing Low Vis­i­bil­ity Pro­ce­dures in de­tail, it is es­sen­tial to ex­plain the fol­low­ing ter­mi­nolo­gies used and the equip­ment re­quired.

Low Vis­i­bil­ity Pro­ce­dures (LVP):

Th­ese are spe­cific pro­ce­dures ap­plied at an aerodrome for the pur­pose of en­sur­ing safe op­er­a­tions dur­ing Cat­e­gories II and III ap­proaches and/or low vis­i­bil­ity take­offs. Low Vis­i­bil­ity Pro­ce­dures in­cor­po­rate safe­guard­ing mea­sures to mit­i­gate run­way in­cur­sions and de­fines op­er­a­tional re­stric­tions to en­sure safe Air­side Op­er­a­tions while tak­ing into ac­count the avail­able aerodrome fa­cil­i­ties.

Five air­ports in In­dia namely Delhi, Kolkata, Lucknow, Jaipur and Am­rit­sar are equipped with In­stru­ment Land­ing Sys­tem (ILS) CAT-III. An In­stru­ment Land­ing Sys­tem uses ra­dio sig­nals to guide air­craft to land when pi­lots can­not see the run­way. The CAT-III sys­tem, short for cat­e­gory three, is among the most ad­vanced. Air­ports Author­ity of In­dia has also for­mu­lated Low Vis­i­bil­ity Pro­ce­dures for Take-off (LVTO) when the Run­way Vis­ual Range (RVR) falls be­low 800mtr/550mtr (CAT-I con­di­tions).

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