Dec 28, 2015

Mediterranean Mooring



In some harbours where there is sufficient room to berth many ships alongside, ships may be obliged to berth at right-angles to a jetty, with their sterns secured to it by berthing lines and their anchors(s) laid out ahead.

This type of mooring can only be employed where there is a negligible range of tide, and is commonly used in Mediterranean ports; for this reason it is often called the Mediterranean (or Med) moor. 

The major considerations are to veer sufficient cable so that the ship can swing clear of other ships at the berth when leaving, to lay the anchors sufficiently far apart to make the ship more secure in wind, and to ensure the anchors do not foul those of other ships. 

In a shallow harbour it is recommended that a frigate veers about 4 shackles of cable on each anchor, and that cables are spanned with and included angle of about 50 degrees, so as to make the ship more secure in a wind. It is obvious, however, that to berth will not be safe if a gale blows from abeam.

If such weather is forecast it is advisable to put to sea or seek a sheltered anchor berth. Ships fitter with a single anchor can, in theory, carry out a Med moor; however, the single anchor will hold the bows steady only in benign weather conditions.

Dec 14, 2015

Learn from Birds


As a sailor, we have so much to learn from nature around us. I learnt from old sailors that seamanship is nothing but common sense. If navigation being part of seamanship, it apply common sense most. I believe every navigator make use of wind and current for their advantage while navigating. So it is very important to let young sailors observe surroundings.

I often bring my naval trainees nearer to Changi Naval Base buoy and ask them to observe sea birds sitting on the buoy and railing and ask them why they all facing in one direction. I enjoy listening to their different answers and i feel happy when I hear sensible answers from some of them.

Often we can see a lot of sea birds sitting on mooring buoys or other marks in the harbour. If watch closely, can find that all of them facing the wind.

Birds fly and land into the wind for maximum lift and control of flight. All birds land into the wind, especially when they need a precision landing on objects like railings. So they land into the wind with maximum resistance against wind.​

Someone asked me once "why they face wind when they are not flying but sitting on a big buoy?" I answered with another question to my female trainee in the group, "Becky, do you like to stand facing a running fan or stand back-facing"? The whole group understood what I meant. No one wish to mess up beautiful feathers by strong wind.

So I asked pointing an aircraft landing at Changi airport, "Who taught these pilots how to land and take off...?"