Radar as landfall aid Radar is useful when navigating in coastal water in restricted visibility. Because in restricted visibility GPS signal might be disturbed.But limitation,Landfall object is not clear.Landfall object is not reliable.Landfall object may situated above or below the radar horizon.Long distant landfall object is difficult to identification.Lighthouse is not radar conspicuous object.Sandy beach … Read moreRadar as landfall aid
Course Recorder Recording course automatically.Recording course on paper belt.Linked to gyro compass or transmitting magnetic compass. SOLAS requirementSOLAS chapter V regulation 28.Not a mandatory equipment. Entries on course recorderSwitched off: Switched off at port. Give date and sign on paper.Switched on: Switched on prior departure. Give date and sign on paper.Underway: Give date and sign … Read moreCourse Recorder
How are ECDIS charts corrected? Software: for ordering, installing and updating chart.Weekly correction: request via email. Once correction received, update ECDIS as well as backup software.ENC list: make sure ENC list is up to date in ECDIS as well as in software.T&P correction: follow the same procedure.Manually update: sometimes have to manually update T&P correction.Weather … Read moreHow are ECDIS charts corrected?
SENC, ENC, RCDS, ENS SENC:System electronic navigational Chart. Once ENC loaded it becomes SENC. ECDIS can convert ENC data to SENC data. SENC data is available in base, standard, all other mode. ENC:Electronic navigational Chart. Just a file containing chart Information. Issued by hydrographic office. ENC may contain additional information. RCDS:Raster chart display system. Display … Read moreSENC, ENC, RCDS, ENS
Raster chart Vs Vector chart difference Raster chartDirect copy of paper ChartCustomisation isn’t possibleChart scale can’t be changedInformation can be addedLook ahead may land on different scaleEntire chart is stored in one single layerChart Symbol as per paper ChartNo alarmSimple and cheaperHigher memory requiredDisplay generation take time Vector chartDigital version of paper ChartCustomisation is possibleChart … Read moreRaster chart Vs Vector chart difference