Wednesday, 9 June 2010

SPLICE THE MAINBRACE AND AHOY ME HEARTIES

I read this article in the Daily Express today & want to share it with you.



It is Seafarer’s Awareness Week and the fact that it is 70 years since Dunkirk and the Battle of Britain gives it a special poignancy.

To Shakespeare the kingdom was “this precious stone set in a silver sea, which serves it in the office of a wall, or as a moat defensive to a house, against the envy of less happier lands”. That is simple fact, if wonderfully put, and not poetic licence.

Our last conqueror William was a Norman or “Northman” with Viking blood enough to get his invasion fleet safely across the Channel to the Sussex coast. But since 1066 the sea has allowed us to remain a free people. Sir Francis Drake and the weather did for Philip of Spain’s Armada.

Napoleon fretted as he built up an invasion force at Boulogne: “Let us be masters of the Channel for six hours and we are masters of the world.” To which Admiral Jervis retorted: “I do not say the French cannot come. I only say they cannot come by sea.” Napoleon’s maritime ambitions foundered at Trafalgar long before he met his Waterloo.

Seafaring goes deeper than defence of the realm. Daniel Defoe described the British as “this ill-bred amphibious mob”, a great seaborne swill of privateers, smugglers, explorers, fishermen and chancers of all sorts, with a brilliance for doing business in great waters. Defoe of course wrote Robinson Crusoe and in reading that we absorb salt water from childhood.

No other place on earth is so rich in tales of the sea. Our literature is alive with them – Long John Silver, Captain Hook, Hornblower RN, the Rime Of The Ancient Mariner – and so is the language. To “know the ropes”, to be “under the weather”, to “pipe down”, to be “groggy” (from naval rum)…The passion for sea air, rock pools, shrimping nets and bathing saw the British invent the seaside holiday.





Brighton, Blackpol, day trippers, piers and fearsome landladies were pioneers when Florida was a swamp and the Costa Brava a string of sand dunes. By necessity the enterprise of creating the world’s greatest empire was entirely seaborne. Our sailors, foreigners complained, were incapable of passing an islet without planting a flag on it.

The men who drew up the Colonial Office list in the 1890s did not bother to tabulate all they owned, wearily ending the list: “And countless other smaller possessions and nearly all the rocks and isolated islands of the ocean.”

Seafarers reflected national morality. In the early days they were pirates and slavers. The grand Georgian terraces of Liverpool were built with the profits of the “attractive African meteor”, the coy name for the slave trade. When the moral U-turn was made in the 19th century the Royal Navy hunted down slave ships and pirates.

It was by sea that British emigrants populated Australia, Canada, New Zealand, a fair part of the US and South Africa. Millions had a last, longing glimpse of home on a boat outbound on the Clyde or the Mersey. A hundred thousand orphans sailed to Canada alone. Indians were taken by ship to Malaya, East Africa, the West Indies and Pacific islands.

More than half the world’s ships flew the Red Duster, the flag of British merchantmen. All used British Admiralty charts and calculated their longitude from Greenwich. Many were insured by Lloyd’s of London. They steamed on Welsh coal from British coaling stations.

The high days of Masefield’s “dirty British coaster with a salt-cakedsmokestack” are done. Seafarers are not. Only five per cent of cargoes imported into Britain and exported from it come by air or through the Channel Tunnel. The rest comes by sea. Less, though, in British flagged and crewed ships.

Our merchant fleet is 15th in the world rankings it dominated for so long, no more than 645 ships, half of them registered abroad. In the great ports of London and Liverpool smart apartment dwellers have replaced the swarming dockers.

Modern ports are still hugely important to the economy. They handle more than 600million tonnes of cargo a year.

Ferries and cruise ships tot up 67million passengers. Volcanic ash does not intimidate a ship. There are 12,000 fishermen at sea in UK waters. And for every fisherman at sea a further 10 jobs are created ashore. We should not forget our seafarers. In 1941 Winston Churchill spoke of the Battle of the Atlantic. Hitler’s U-boats almost starved us into submission by cutting the sea lanes and 30,000 men of the merchant navy gave their lives to stop him.

We needed to bring in a million tons of cargo a week to survive then. We need almost that much a day now. The sea and its seafarers are with us always. l Many local communities and companies are taking part in fundraising activities during Seafarers Awareness Week. Go to www.seafarers-uk.org for details.

Tuesday, 8 June 2010

WHAT'S A VPIRB?

A VPIRB (VHF Position Indicating Radio Beacon) is a Maritime Survivor Locating Device (MSLD), specifically designed to alert the parent vessel that they have lost one of their crew overboard.

In most man overboard (MOB) situations, the vessel from which the person came from is in the best position to render immediate assistance.

A VPIRB is equipped with an internal GPS receiver, and uses VHF DSC (Digital Selective Calling) and synthesised radiotelephone (voice) transmissions to broadcast this GPS position to all vessels and shore stations in range.



DSC is a very suitable technology for a MSLD, as it allows alerting of both the parent vessel, and all other DSC-equipped vessels in the immediate vicinity.

Personal Emergency Position Indicating Radio Beacons (EPIRBs) have saved many thousands of lives over the years; however they rely on shore infrastructure to process and then re-broadcast an alert message to ships in the vicinity of the person in distress. Depending on the location of the EPIRB, this could involve delays in the order of hours.

A VPIRB activates automatically on contact with water, or it can be manually switched on. It will provide alerting ranges in the order of 2 nautical miles from a typical small boat. Larger vessels and shore stations with higher antennas will receive the distress signal over longer ranges.

At present, there is only one VPIRB model available, the Mobilarm V100 VPIRB.
HOW DOES A VPIRB WORK?

The VPIRB can be automatically activated from the 'armed' position when the device is immersed in water. Manual activation is also possible.

The VPIRB transmits an alert, a unique identity number and the MOB's exact GPS coordinates to all vessels in the vicinity, including the distressed mariner's vessel, as well as to any land-based VHF receivers in range.

The VPIRB automatically sends an initial "Mayday - man overboard" alarm in DSC data message format, using VHF DSC (channel 70), to alert the parent vessel and other vessels that the MOB event has occurred.

As soon as a GPS lock is obtained, typically in under 30 seconds, the distress call is transmitted again with latitude and longitude coordinates, using VHF DSC and in a synthesized voice format on VHF marine channel 16. This is repeated at regular intervals to update rescue personnel with the MOB's current position.
Overview of the VPIRB Rescue Anatomy
Overview of the VPIRB Rescue Anatomy
NOT JUST ANOTHER EPIRB

Conventional marine personal locating beacons such as personal EPIRBs must be manually activated to send any signal - as mandated by regulatory authorities. This may be difficult or impossible to do if a MOB is injured or unconscious. Personal EPIRBs transmit an emergency signal to a remote onshore location, which can introduce unnecessary delay in the recovery of an MOB - greatly reducing their chances of survival.

VPIRBs provide instant notification to a mariner's vessel that a MOB event has occurred, alerting the people who are in the best position to rescue the MOB and ensuring they are deployed as soon as possible.

VPIRBs do not require any additional dedicated receiving base stations, 121.5 MHz directional finding equipment or satellite rental time. With a VPIRB, as long as a VHF radio is onboard, no other equipment need be installed; the VPIRB uses only existing industry-standard VHF marine radio networks.

source

Friday, 4 June 2010

GMDSS - A WAY AHEAD

The following is a summary of a presentation made to the 2010 RTCM conference in San Diego, USA.

GMDSS - A WAY AHEAD
What’s wrong with DSC?

 These days, the GMDSS is all about Satcoms, and the drive for more and more bandwidth to ships. No one uses the GMDSS HF gear…it sits in the corner of the bridge, gathering dust….right?
  
Wrong.


A typical GMDSS HF Coast Radio Station receives, on average, 6000 DSC calls per day. 6000 calls, distributed over 2 – 16 MHz….Even using a modest antenna system, you can hear calls on the 12 and 8 MHz DSC channels at least every minute, all day.
 
What’s the problem?
 The system is clearly being used and is working well technically – ships are communicating with coast stations and other ships.   DSC was originally designed to automate radiotelephone calls between ships at sea and telephone subscribers ashore.  However, satellite/cellular communications have replaced HF radio-based telephone systems for merchant ships. The result is that DSC is effectively designed around a function that no longer exists. This is evident in the number of redundant tele-commands incorporated in the DSC standard.
 
Confusion….it need not be so…
One of the great advantages of using a PC for coast station DSC software is that the operator interface can be easily modified or redesigned.  We can change labels, we can alter the layout and we can hide the more baffling DSC tele-commands to make the system operator friendly.   Alas, ships can’t do that...  They are faced with a myriad of menus, containing many superfluous commands, all which are never used. 
The DSC technical specification, ITU Resolution –M.493, has been revised 13 times since it was first published.    Many of the revisions incorporate very important operational and technical updates, which make the system much more efficient and easier to use.  Equipment performance standards are updated as a result of the revisions, and DSC manufacturers dutifully incorporate these updates into their latest products. 
However, where the good ship DSC hits the proverbial iceberg is real-world implementation - the revised performance standards apply only to new equipment

There is no requirement for ships to update their DSC equipment to comply with new specification.
So, as a result, ships are sailing around with 1st   and 2nd generation DSC systems….old and clunky, full of redundant tele-commands, and thus a nightmare to use….

To their credit, the USCG has identified this problem. 

They put a paper to the recent IMO COMSAR meeting proposing that SOLAS Chapter 4 be modified to require the latest DSC software version to be used. This issue is moving forward through IMO, but it will take time to implement…
 
Oversight…
Despite all the DSC traffic, many ships are still making fundamental mistakes with the system. 
Using the latest software will go some way to fixing the problem – but, what is really needed is for some central body to take charge of DSC, and conduct an active monitoring and education campaign.   
 Internet technology allows remote control of DSC shore stations from anywhere in the world. 
 A number of DSC HF monitoring stations could easily be controlled from a central point, to provide world-wide coverage.    It would be a simple matter to match a ship’s DSC identity number (MMSI) to her Inmarsat number.   Ships which regularly breach DSC operational standards could be sent a polite reminder (or even an operational guide) via Inmarsat….. 
 
Don’t let small craft near DSC…!
 Many SAR agencies are reluctant to promote VHF DSC to recreational users because of a fear of false alerts. Any automated distress system will suffer a certain percentage of false alerts, either malicious or inadvertent.  Training, education and equipment design will address the majority of these problems - but there is one solution that would really solve the DSC false alert issueMandate that all DSC equipment is to be fitted with an inbuilt GPS/GNSS receiver.


  • Every distress call will contain a real position.


  • This will all but eliminate malicious false alerts.


  • Inadvertent alerts will be identified and localised.
 GPS receivers are small and cheap – they could be easily integrated into a VHF radio.
  
In summary - Fixing DSC…


  • Remove the remainder of superfluous tele-commands from the standard, to simplify the system as much as possible…DSC isn’t going to be used for setting up phone or fax calls……


  •  Mandate updating of ship equipment to comply with the latest standards.


  •  Become pro-active with monitoring and real time education/mentoring.


  •  Fit an integrated GPS receiver to all new DSC radios.
 
 
UPDATING THE GMDSS
Let’s get rid of DSC….it is all too hard…
There has been ‘corridor discussion’ at IMO of removing MF DSC from Sea Area A2 and possibly A3 – this smacks of the ‘turn it off and ignore it’ philosophy demonstrated by some ships.  Abandoning DSC would be a serious mistake.   The inherent strength of the GMDSS is the multiplicity of communication links it provides over different satellite and terrestrial bearers.   If one system is down, you always have an alternative. 

 MF DSC provides ship-ship and ship-shore alerting in Sea Area A2 and ship-ship alerting in Sea Area A3. 
 What do we replace it with?  Satcom systems can not provide direct ship-ship alerting to all other vessels in the area of the ship in distress. Inmarsat C has demonstrated its worth time and time again for ship-shore alerting – it is one of the GMDSS’ standout sub-systems.  However, it can not replace DSC.
Yes, DSC has problems – but we must fix them, not just give up and say it is all too hard…..
 
NBDP?  Ditch it…
NBDP (aka radio telex) is a clunky old system that (to my knowledge) has never been used in anger for distress traffic.  A3 ships already have an option to dispense with it – this should logically be extended to all A3 ships. I know if the water was coming in the bridge wing door, I would rather be talking into a microphone than trying to type on a keyboard…
 
A truly global system?
Australia is still effectively running 2 distress systems in parallel – GMDSS and pre-GMDSS.  Australia is not alone in this – many developed nations still run old and new marine radio networks.
 Many areas of the world have no GMDSS infrastructure at all…
 Why? The GMDSS has been in place for more than 10 years….
 If we are going to modernise the system, then surely we need to start with making it universal.
 
Way ahead……it isn’t rocket science….
 
·         GMDSS shore infrastructure needs to be installed in the Pacific.
 
·         Marine Radio equipment standards for smaller, non-SOLAS vessels need to be modified to include DSC
 
·         Governments need to amend their marine legislation to require DSC equipment to be fitted to all ships - large and small.
 
·        GMDSS Sea Area A1 needs to be declared in areas of high shipping activity.
 
·       Governments need to develop a transition plan to eventually phase out voice watchkeeping and replace it with automated DSC watches.

Source here

Thursday, 3 June 2010

Ghost Ship.

I love this image of the fishing boat high & dry.
is it abandoned? or is someone coming back for her?

Wednesday, 2 June 2010

GHOST SHIPS



GHOST SHIPS

I have always been fascinated by old ships. The ones laid up in harbour & left to rot. From my time at sea, I know that a ship is just not a lump of metal, she is a living breathing thing & seeing these once proud ships lying there waiting patiently for their fate always makes me linger.

IWO JIMA class Amphibious Assault Ship (USS Tripoli)



Here is a great site by Amy heiden Click here for site She has photographed many of the U.S. Ghost ships & writes very eloquently about what it is like to be onboard one.....

Her Flickr site is fasinating & holds many fantastic images link



The "Mothball" Fleet [also known as the National Defence Reserve Fleet] is a collection of decommissioned military ships (cargo ships, tankers, Victory ships, missile cruisers, barges and tugboats) sitting in Northern California's Suisun Bay. Very few of these ships are reserve ready (thought many of them were years ago). Most have been decaying here for decades and await scrapping.

Not quite ghost ships but near enough. Ships laid up due to the down turn in the Global economy.







I do not know the name of her.

If anyone has any information, please post it here.

USS Gage leaves James River Reserve Fleet

The USS Gage departed the James River Reserve Fleet Thursday, headed to Esco Marine, Inc., in Brownsville, Texas, for recycling. According to the Department of the Navy's Naval Historical Center, the attack transport USS Gage was commissioned in November, 1944. During World War II, the Gage participated in the initial assault on Okinawa in April, 1945, landing men and supplies for five days despite nearly continuous alerts of Japanese suicide attacks. She was decommissioned in Norfolk in February, 1947, and transferred to the Maritime Administration Reserve Fleet in September, 1958. Esco Marine, Inc. was awarded a contract to recycle the Gage on July 3rd.

The Gage is the 81st ship to leave the James River Reserve Fleet since January 1, 2001.

NASA Satellites Keep Watch on Gulf Current Near Spill

NASA satellite altimetry data are being used in combination with data from other satellites to track changes in a huge warm ocean current in the Gulf of Mexico that could transport oil from the Deepwater Horizon oil rig far away from the Gulf. Image credit: NASA/JPL/University of Colorado

Scientists and agencies monitoring the oil spill in the Gulf of Mexico are keeping a wary eye on changes in the nearby Loop Current, a warm ocean current that is part of the Gulf Stream. Beginning as a large flow of warm water from the Caribbean, the Loop Current heads up into the eastern part of the Gulf of Mexico and then turns south before finally moving out through the Straits of Florida and northward into the Gulf Stream. Deep and fast moving, the Loop Current often breaks off and forms strong, clockwise rotating eddies called anticyclones that travel westward into the Gulf. The currents along the outer edges of the Loop Current, as well as these eddies, have been clocked at speeds as high as three to four knots (three to five miles per hour), comparable to the fastest ocean currents ever observed.
Because the Loop Current and its eddies are warmer, and thus higher in surface elevation, than the surrounding waters, they are easily spotted by satellite altimeters, such as those aboard the NASA/French Space Agency Jason 1 and Ocean Surface Topography Mission/Jason 2 satellites. Scientists use the latest satellite measurements of sea-surface height from these and other satellite altimeters to create maps showing the location, direction and speed of currents in the Gulf of Mexico.
This image, created on May 23, 2010, using measurements of sea surface height from multiple satellites, including Jason-1 and OSTM/Jason-2, shows the speed and direction of surface currents in the Gulf. The northern portion of the Loop Current, shown in red, appears about to detach and form a separate eddy--a large, warm, clockwise-spinning vortex of water that is the ocean's version of a cyclone. The star shows the former location of the Deepwater Horizon drilling rig that exploded and sank in April, and has been leaking oil since. Scientists believe a large eddy between the oil spill and the Loop Current could keep, at least temporarily, some of the spilling oil from reaching the Florida Straits and the Gulf Stream.
This map was produced by the Colorado Center for Astrodynamics Research in Boulder, Colo. The center processes satellite measurements of sea surface height in near real-time to create maps of the Gulf of Mexico, showing the location of medium-sized eddies and fronts. More information on these data products is available at http://argo.colorado.edu/~realtime/welcome/.

 Source here