Virtually anyone can be subject to sea sickness or motion sicknesssense of spatial orientation

Both inner earseyes observe where our body is in relation to its surroundings as well as the direction of motion.

All these sensory data will subsequently be processed in the central nervous system, which enables us to balance, move and position ourselves properly in our three dimensional surroundings.
The symptoms of motion sickness appear when the brain receives conflicting messages from the 4 systemslethargy and a slight drowsiness. But for the victims it will usually start with a nauseous feeling and/or a slight cold sweat. Then these symptoms increase, and the face becomes paler, perhaps even greenish. Any attempt to concentrate on a task will worsen this predicament. The nauseous feeling eventually becomes incontrollable, and leads to - sometimes violent - vomiting.

Prevention of seasickness

Hours before casting off you could well use an over-the-counter antihistamine such as meclizine or dimenhydrinate and you should - before and during the voyage - avoid spicy or rich foods, alcohol and apples. For longer trips, a prescription medication called Transderm-Scopolamine patch can be worn behind the ear for up to three days at a time. Side-effects of these medications usually consist of sedation and dry mouth. Interestingly enough : Recent studies have shown that ginger root may be as effective as the other drug treatments but is associated with fewer side effects. If, despite all these precautions, you still notice the early symptoms with one of you crew, act immediately and :

• get the victim out on deck but not in direct sunlight other than steering.
  Steering - as well as studying the horizon works and will help to anticipate the boat’s motion. Else let the victim lay in the cockpit to leeward with closed eyes.
• Steady the yacht, either by heaving to or letting the best helmsman drive the yacht.

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When about to enter, sail or charter your own yacht in Greek waters:

Customs & port police

• When entering Greece all yachts must clear with port authority, customs and health as well as immigration and currency control.
  The ship’s papers - including a passenger and crew list - will be inspected by the port authority, then customs will issue a transit log, renewable after six months but valid for one year. which allows the yacht to sailing in Greece. The transit log should be issued only to non-EU vessels, or to EU vessels wishing to purchase fuel at duty-free prices. At subsequent ports this transit log may be inspected by the port authority. When leaving Greece, the transit log is returned to customs.
• Yachts must carry their original registration document and ship’s radio licence and one member of the crew requires a certificate to operate the radio/VHF. For EU boats, proof of VAT status is also required. The original insurance certificate and a Greek translation showing third party insurance with the amounts in figures. The minimum amounts are 293470 EURO liability for death or injury by sinking, collision or other cause for crew and third parties, 146753 EURO for damage, 88041 EURO for pollution. The skipper must have an International Certificate of Competence.
• The nights should be spent on board - and not in hotels inland for instance - if not, the harbour master and immigration should be notified. Individual passports are not stamped on entry into Greece by yacht, nor is this required for departure with the same yacht. However, if leaving by another means (by air), the stamps are required by immigration at the point of exit.
• Fishing is only allowed with a snorkel at certain areas. Fishing with scuba gear is prohibited.
• Also to protect archaeological sites, scuba diving is restricted. Permission should be sought locally.
• You as the registered yacht owner should be on board. Yet, if a relative or friend fills in your place, make sure to ask the port police for the proper documentation.
• Chartering by foreign yachts is allowed since 2002, but your yacht should be inspected and certificated according to Greek law, a proces that involves a huge amount of red tape.
• Hauling out a yacht requires authorisation of the port police.
• When entering Greece, cats and dogs require health and rabies inoculation certificates issued in the country of origin, not more than 1 year previously for dogs, 6 months for cats, and not less than 6 days before arrival.
• Foreign yachts can buy fuel duty-free, with customs approval, at stations that are marked by yellow & blue diagonal stripes.
• The Greek courtesy flag as well as the Q flag must be flown in the correct manner (position, size, condition).
• A visa is not required for a visit of up to three months for nationals of the EU, Andorra, Antigua, Argentina, Australia, Canada, Ecuador, Iceland, Israel, Japan, Liechtenstein, Mexico, New Zealand, Nicaragua, Norway, St Kitts and Nevis, South Korea, San Marino, Switzerland, Taiwan, the USA and Zimbabwe. Entry may be refused if there are Turkish Cyprus stamps in the passport.

Fees

• All Non-Greek Boats (over 7 metres):
  There is a charge of 5.80 EURO per metre, payable at the first Port of Entry. This is called a “Circulation fee”. If planning to stay in Greek waters 12 months or more, the same fee will buy you a permit called “Private Pleasure Yacht Permission for Stay and Maritime Traffic Document”. It is valid for 3 years and is a single-sheet A4 document.
  In 2002 an additional flat charge of 15 EURO was introduced for actually issuing these permits. This is called the Port Police charge.
  The penalty charge for re-entering Greece within 30 days has been withdrawn, although the “Circulation Fee” will still be due.
  At present there is no further news on what action the EU Court is planning regarding the refusal by the Greek Government to abandon this illegal tax.
• All Boats:
  The third charge is 30 EURO for a DEKPA - Private Pleasure Maritime Traffic Document. This is a 6-page A3 booklet, which must be presented to, and stamped by, the port authority on entry to, as well as exit from, each port visited. It is valid until all 50 boxes are stamped. This charge is applied to all yachts including Greek-flagged ones.
• Non-EU Boats:
  For non-EU registered boats after 90 days, there is a charge of 14.67 EURO per metre and they must obtain a formal “Transit Log”. This charge is levied at the end of each 90 day period, and it appears that if the yacht leaves Greece before the end of 90 days the charge will not be made.
  Possible other charges:
  All public harbours now charge a mooring or anchoring fee based on the tonnage and length of the yacht, usually about 6 EURO for 11m. Boats from EU countries pay lower fees than those from non-EU countries, while Greek flagged boats pay even less. There is a basic fee charged at every port for completing the paperwork. A lower fee is charged for anchoring. In most ports these fees are charged even if stopping for provisions only, or even to buy fuel. Re-launching fee of 7.34 EURO. A fee is charged by customs for each fuel delivery.

Please note that even the Greeks contradict themselves when interpreting these laws. The various guides also disagree at (minor) points, plus the European Union has put a lot of pressure on the Greek government to adopt less protective regulations, hopefully changing regulations in the near future. This pressure was already successful in 2002 and 2004.

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National flags or ensigns

The vessel’s national flag - not necessarily the same nationality as the skipper or owner - should be displayed at the stern of the yacht; however on traditional yachts, placement on the main leech or gaff is historically more correct.
If the crew’s nationality differs from that of the yacht, the crew’s national flag can be flown under the courtesy flag at the starboard spreader. Likewise the nationality of an important guest on board is displayed this way.
Note that the European flag should not be used, since it doesn’t refer to a nation.
Flag and ensign are synonymous. The name ensign is derived from the French enseigne and Latin plural insignia.

Courtesy flags

When in foreign waters the courtesy ensign, often the national flag of that country, is hoisted under the starboard spreader of the most forward mast. On a mastless powerboat, the courtesy flag replaces any flag that is normally flown at the bow.
Like the national flags or ensigns, the courtesy flag is hoisted at 08:00 local time and lowered at sunset. Yet, when manoeuvring - for example entering or leaving port - the national flags should be flown even at night until your ship is out of sight or safely at dock.

Q flag

The yellow Q flag should be flown instead of the courtesy ensign until the yacht is properly cleared by customs and immigration, after which the Q flag is replaced by the courtesy flag.

Burgee

The - often triangular - burgee from the skipper’s yacht club or sailing organisation is also hoisted at the starboard spreader, but below the courtesy flag. International yacht club burgees are often hoisted above the nationality flags of crew or guests. Yet, purists will say that also crew national flags should be hoisted above any burgee. Too avoid possible insult it is therefore best to fly your burgee below all national flags!
The burgee may be flown day and night.

International code of signals

First drafted in 1855, this visual system was first published internationally in 1857 and gradually adopted by most seafaring nations. The 1932 modernisation allowed for new situations like a medical distress call involving radiation casualties (AN 2). Some other interesting examples: (IT): I am on fire; (US 4): Nothing can be done until weather moderates; (GM): I cannot save my vessel; (NC No and Yes) is used as a distress signal.

Alphabet

A	B	C	D	E
F	G	H	I	J
K	L	M	N	O
P	Q	R	S	T
U	V	W	X	Y
Z

Numerals

0	1	2	3	4
5	6	7	8	9

Repeaters

First	Second	Third	Fourth

Another useful flag

Diver down

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What nautical charts should I use in Greece?

Short Answer:

British Admiralty charts!

Long Answer:

For safety reasons you should at least have onboard the Greek Waters Pilot or the Ionian Sea Pilot by Rod Heikell together with the accompanying Tetra charts by Imray. Yet, the BA charts are generally much more detailed and precise than the Tetra series.
The Greek charts by the Greek Hydrographic Office are often preferred as well.