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Best practices in watch keeping procedures
Every
sailor and every skipper has a preference for certain watch keeping schedules
and procedures for offshore passages and blue water sailing. There are many
variations, each offering distinct benefits. The Ocean Cruising Club has among
its members many highly experienced sailors with different approaches to
sailing – some singlehanded, others short-handed, and some with full and
rotating crew.
We have
collected a series of discussion points from OCC members as expressed in
various OCC venues including the Forum, the Facebook page, and in publications that
may be of assistance to individuals planning to sail long distances who wish to
consider various options for standing watch. Keeping watch is an essential
component of good seamanship, and the OCC supports the efforts of crew to
become knowledgeable about the Rules of the Road, to familiarize themselves
with best practices and to maintain a vigilant watch under all conditions. This
is not a definitive prescription but a set of suggestions based on the
collective experience of sailors who have each sailed long distances across
oceans.
Keep in
mind that it is up to the Master or Skipper of the vessel to make decisions about
watch keeping procedures that will best suit his/her crew, vessel, and
conditions.
- Follow the Vessel's Standard Operating
Procedures (SOP)
Most skippers have rules they adopt for decision making aboard their
vessel on passage. Those rules tell crew how often to make entries into the log
(e.g., at least every hour and for every radio contact), under what
circumstances to wake him/her (e.g., change of weather, sail change, gear
issues, collision avoidance issues), and safety precautions to take (e.g., STAY
ON THE BOAT which means lifejacket and tether offshore, clipped in before
entering cockpit, always someone else on deck if going forward). It might also
include guidelines about when to run the engine or generator. Good seamanship
dictates SOP under certain circumstances like deciding when to shorten sail
(the time to act is when you first think of it). Ask questions if you are not
clear. The most important thing for the skipper to know is that he/she can
trust the crew to alert them if there is uncertainty about a situation.
- Get Plenty of Rest
When off watch, make
sure you rest even if you can’t sleep. Short naps just before your watch will
keep you alert longer while on watch. Get a minimum of 6 hours sleep if you
can. Certain watch schedules facilitate long periods of rest during the day.
- Wear the Right Gear
Wear layers for warmth
and comfort, always bring foul weather gear with you on deck, and always wear a
life jacket with crotch strap and tether offshore. Clip in to a secure deck
fitting before leaving the cockpit. Staying on the boat is the number one
rule, especially when it comes to short-handed sailing. Consider carrying a
personal locator beacon (PLB) or AIS SART device or both
Most agree that keeping
a constant watch on deck is not necessarily the best option depending on the
conditions. A dry, warm, comfortable watch keeper is likely to be more
effective than one who is cold and miserable. Good shelter on deck in the
likes of a spray hood, dodger or a Hasler Pramhood are necessities.
- Hydrate and Snack
If you are prone to
seasickness, stay well hydrated and replenish your electrolytes, vitamins and
minerals with supplements. Eat light snacks to maintain alertness.
- Check the Course and
the Sail Trim
Our silent crewmembers,
the autopilot and wind vane self-steering, are lifesavers for short-handed crew
but they can on occasion be quite mischievous. With a wind vane set to a
particular wind angle, you can be doing circles and not realize it. Autopilots
can sometimes wander off course without any warning, especially if power is
getting low. Check the compass every 30 minutes to make sure
you are still on course. Adjust the sail trim accordingly if there is any
change in course or wind direction and speed.
- Use Your Binoculars
Scan the horizon every 10-15 minutes. Ships can
move very quickly out there. Scan through a full 360 degree arc with binoculars.
The horizon can be difficult to find on a dark night. If you can see stars,
scan just below the lowest stars. Scanning with binoculars helps pick out
objects in low light. Remember that collision avoidance is a primary objective
of keeping watch. Note any approaching weather as well. While you are at it,
use the binoculars to check the rig and sails for wear or any problems.
- Familiarize yourself with the COLREGs
It is imperative for anyone standing watch to be
able to interpret vessel lights, day shapes and sound signals and know the
rules for effective collision avoidance. The international collision
regulations (COLREGs) are clear that if a ship has radar, it must be used for
collision avoidance. This applies to AIS today as well. After scanning the
horizon, check the AIS and radar systems to see if there might be any ships you
failed to identify visually. Don’t rely on AIS alone as many vessels still do
not have AIS or do not turn it on at sea.
- Update the Ship’s Log
Enter vital information
in the ship’s log book at least once per watch. Once per hour can help you stay
alert and note any issues before they become problematic. Enter navigation
information (time, course, speed, position [lat/lon], sea state and weather
conditions) separately from engineering information (battery, oil, water and
fuel levels). Note times underway, course changes, landfall, anchoring and
mooring. Note any sail changes and ships spotted. Log all radio contacts.
Check and note water temperature and oil pressure if the engine is running.
In the event of an accident, a well-kept and up
to date log provides some evidence
that the vessel was being well-run and a watch was being kept. This vital
legal document can be used in a court of law. Keep your logs neat, concise, and
use proper entry procedures. That includes log entry corrections, too. Use a
single line to cross out an error and initial the correction near the entry.
That way, the correction can still be read and you can address any questions to
the person who made the correction.
- Put on the Kettle
Just before you wake the next watch keeper, put on the kettle for
that all important hot mug of tea, coffee or soup. Some people avoid caffeine
so they can sleep better while off watch, but everyone likes something warm
especially during the night.
- Give a Thorough Briefing
The most important part
of passing the baton is to provide a thorough briefing. What did you see, what
did you change/adjust, what should the next person pay particular attention to?
Were there any vessels or fishing gear, and where are they now? Has there been
a change in wind or sea state? Did you hear any radio contacts? Did you see
any wildlife? Keep it simple and easy to remember.
- Use Reminder
Devices
Kitchen timers are
wonderful for reminding crew to go up on deck every 10-15 minutes and have a
thorough look around. Wrist watches and countdown devices that have an easy
reset feature are also popular. Of course, devices such as AIS, radar
proximity alarm or radar detector can be invaluable in alerting to the presence
of other ships in the vicinity. One member has even constructed a clockwork
run back timer which activates a bright red LED and a 90 db piezo buzzer when
it reaches zero (and a dim green LED to show it is active and counting down).
- Which schedule
works best?
Every team has a
different routine they prefer. Most say the routine in daytime is less rigid
than at night. Daytime is when short-handed crews get most of their rest. Single-handing
is not the best option for safety, but sometimes it is the only option. Generally,
crew makes adjustments for the special considerations onboard. If one person
doesn’t like night time and the other does, then watches are arranged accordingly.
The experience of the crew must also be taken into consideration. A crew
member who is inexperienced should be teamed with someone who is.
Here are a few options for
preferred watch keeping schedules:
Some Options for Watchkeeping Schedules
|
Crew |
Schedule |
Benefit |
Single-handed |
20 minutes sleep
cycle with loud alarms (timer, AIS, radar proximity, radar detector, off
course alarm, battery low alarm, etc) |
The amount of time to
traverse the distance to the horizon seen from the deck of a small vessel. Heave
to for longer rest during the day. |
|
|
|
Double- handed |
6h on/6 h off |
Long sleep/relaxation
time but also long watch at night |
|
6h on during the day,
4 h on at night |
Both get to see
sunrise and sunset on alternating days, and no one gets the midnight shift
two days in a row. A loosely defined 6 hours during the day ensures plenty
of rest. |
|
6h on during the day,
3h on at night |
Stays on same shift
every day so it becomes routine. |
|
4h on/4h off day and
night |
Easy
to keep track. The main meal would be during the 1600 to 2000 watch which
would be shared. The 4 hour watch ties in with the science of sleep – the
sleep cycle from light sleep through deep sleep to REM sleep takes 90 – 100
minutes, and the first two such cycles are when most of the good work of
renewal is done. So you fit two such cycles neatly into four hours, with
enough time to get to sleep, and to rouse yourself for your watch. |
|
2h on/2h off at
night, loose during the day |
Least tiring period
at night time, long rest periods during the day |
|
|
|
Crew of 3 |
Overlapping 6h or 4h
hour intervals. (One crew member changes every 2 or 3 hours) |
Fresh crew shares
watch with tired crew. Always have 2 people watching each other ready to
assist. |
|
Non-overlapping 4h
intervals |
Each person has only
two 4h watches daily. |
|
|
|
Crew of 4 |
Non-overlapping 3h
intervals. |
Each person has only
two 3h watches daily. |
|
Two crew paired for
watches same as double-handed |
Two crew will always
have someone watching the other if a problem occurs |
|
|
|
Crew of 5 |
Overlapping 4h
intervals |
One watch per night
per person, but always two people on watch together |
|
|
|
Crew of 6 |
Non-overlapping 4 h
intervals |
Two watches daily per
person, but always two people on watch together |
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