Position Circle by Raising and Dipping or First Sighting and Last Sighting 

Most welcome. Best wishes

Most welcome. Best Wishes

Thanks you liked

Good morning For preparation of second mate / DNS/ BSC nautical science/NCV come in #kundanpatna

Glad you liked it! Best Wishes

Most welcome

Good morning For preparation of second mate / DNS/ BSC nautical science/NCV come in #kundanpatna

So nice of you

Anirudh, technically it is the lesser of the two - if sufficient data is available to calculate both. If you can calculate only one - for want of data, please use the one you calculate. This is under the assumption that the other one is more than the one calculates - so again using lesser of the two. Hope clear. Best Wishes

@@MarineGurukul Thanks alot sir.

If you cannot see the light, then how would you know that it is raised. For light to be visible both conditions need to be satisfied. If data is insufficient, then we go by the range that can be calculated - else lesser of two. If still in doubt, please revert. Best Wishes

@@MarineGurukul thanks sir

But in the morning luminous range does not matter right. We can see the lighthouse from GR range.

Only for Exam - If information is not sufficient to calculate both GR & PLR, then calculate the one possible & use it - under assumption that what you have calculated is lesser of the two, Hope clear. Best Wishes

Highly appreciated ,Thank you sir

Take lesser of two.

Sorry did not understand your question. Is there any oversight in video??

There is no explanation, but in such a you do visual interpolation between the curves. Else, you may find PLR for both visibilities and do linear interpolation. Thanks

I think that was a clerical error. It should have been 6.7 NM. Thanks & Best Wishes

Welcome & Best Wishes