Ship Navigation

Rajeev Jassal
Rajeev Jassal Master

I have heard many explanations for why the give way vessel in a crossing situation shall avoid crossing ahead of the other vessel. The most common explanation I hear is that you do not want to be in direct line with a vessel approaching towards you.

But all these explanations do not make any s

Rajeev Jassal
Rajeev Jassal Master

I have written a detailed post on ordering and correcting ENCs on JRC ECDIS using chartco. I hope this could be of some help.

You can read this blog on the below link.

A step by step guide to ordering and correcting charts on ECDIS

Rajeev Jassal
Rajeev Jassal Master

No, we cannot take the sextant altitude when it is dark. That is because if it is dark we would not be able to see the horizon.

But if it isn't dark we cannot see the stars.

Then how can we take the sextant altitude of the stars for the star sight?

We can. We just need to know the right tim

Rajeev Jassal
Rajeev Jassal Master

From all the rules in the COLREGS, rule 1 and 2 are most difficult to interpret. Let us see what rule 1b and 1c says.

Rule 1b

Nothing in these Rules shall interfere with the operation of special rules made by an appropriate authority for roadsteads, harbours, rivers, lakes or inland waterways conn

Rajeev Jassal
Rajeev Jassal Master

Both the speed through water and speed over ground will change with the wind.

It will increase of decrease would depend upon the relative direction of the wind.

How much the speed would increase or decrease would depend upon the wind force and ship's windage area.

To understand the concept of

Rajeev Jassal
Rajeev Jassal Master

ECDIS has made it much easier for the navigator to safely navigate the ships. But that is only true if the ECDIS is used in a correct way and if it is used to its potential.

ECDIS can surely help in collision avoidance and it must be used for collision avoidance but not as a stand-alone equipment.

Rajeev Jassal
Rajeev Jassal Master

When dealing with TSS situations, always keep this in mind.

A vessel following a Traffic separation scheme does not get any special rights over any other vessel.

So for all the TSS situations consider that if there is a risk of collision, the rules for that situation would apply.

In the case of c

Rajeev Jassal
Rajeev Jassal Master

Here is a blog that I wrote on "Speed over ground and speed through water". This might help.

Speed Through water or speed over ground, Which one to use?

If you any other specific question on this, do not hesitate to ask.

Rajeev Jassal
Rajeev Jassal Master

I totally understand the confusion here and trust me, you are not alone. Imagine a cadet being subjected to these tough sentences. I believe if the circumstances of the case admit, there should be a simpler version of the rules of the road.

Ooops.. I used it too. But don't worry. I will si

Anirban Sarkar
Anirban Sarkar Third Officer

Confined waters are the waterways where the width of the waterway (not the navigable channel in the waterway) is below 8.5 times of the beam of the vessel.

Seafarer
Seafarer Deck Cadet

A give way vessel can be classified as a vessel that is directed by the COLREGs to keep out of the way of another vessel and avoid a risk of collision or a close quarter situation.

A stand on vessel would be the one which has been directed in accordance with COLREGs to keep it's course and spee

Rajeev Jassal
Rajeev Jassal Master

Indeed a very good question.  To answer this, I would first highlight the fact that putting the rudder on midship when engine is running astern is a practice rather than a rule.

There is no rule that we have to keep the rudder on midship when giving astern movement on the engine.

But why

Prateek Yadav
Prateek Yadav Chief Officer

Trawler is a type of Fishing Boat. Trawler can be easily described where some sort of Drag Net, Beam net are used ETC. Before we go further we should know what is Trawl. Trawl means Fishing Net, now these nets are used to pulled along the bottom of the sea or in mid water at a specified depth. Trawl