Immediate Actions
First, here is what you should not do when you run aground. Unless you are
absolutely sure that it is a small shoal with deeper water ahead, do not apply
power and try to push your way across, you will only put yourself harder
aground. Do not immediately shift into reverse and increase engine power in an
attempt to back off, you might suck up mud and/or bottom vegetation into the
engine intake (watch for any signs of engine overheating), and you might further
damage the propellers.
Instead, take time to assess the situation. Is any water coming into the hull?
Where exactly are you? How did you get there? Where might deeper water lie?
What is the state of the tide?
If you have a dinghy in the water, or can launch one, use it to take soundings
all around your boat. If you are in a rocky area, it is especially important not to
attempt to refloat the craft immediately. First, check for any hull damage. The
rocks you are on might be the only thing keeping your boat afloat! If the damage
is considerable, set out an anchor or two to keep you in place for the time
being. Even if you don't need any immediate assistance, you should radio the
Coast Guard or other local authority. Advise them of your situation and your
intended actions.
Let's assume that you are lucky and that the tide is rising and that the
increased depths will be enough to float you free. Although you might get
offsooner if another vessel pulled, letting the tide float you off is less stressful
on your hull and your crew. It may be necessary to set out an anchor in the
direction of the wind and waves to prevent the rising tide from carrying you
further up on the shoal.
If you are less lucky, and the tide is falling, quickly assess the situation and the
possibility of refioating the boat before the tide goes down further. If this is not
possible, determine how far it will go down. Will the hull need cushioning and
supports as it lays over on its side? While you wait for the tide or assistance,
you might want to use the opportunity to inspect and clean your hull's bottom.
(If you are quick on your feet you might even be able to convince others that
that was why you went aground!)
Getting Off
If you are only lightly stranded, you may be able to get off without assistance.
First, determine where deeper water lies, this may or may not be the direction
from which you came. Then, try to reduce draft. In any type of craft, sail or
power, you can empty water tanks if the supply isn't critical.
You might also place some heavy gear in a dinghy. On a sailboat, you can try
reducing draft by taking a halyard out to one side, attaching it to an anchor or
another boat, and pulling. Yet another maneuver is to put out an anchor in the
direction in which you wish to move. If you have an anchor windlass or a sheet
winch, use that to take in the line. This is called "kedging off." The anchor can
be carried out by dinghy (with the line in the dinghy being paid out as it moves
away from the vessel). If this isn't possible, the anchor can be supported on
PFDs or buoyant cushions and floated out to where it is to be set, the longer
the scope, the better.
If another boat is available to help you, run a line to that boat if it can pull in
the desired direction. Be very careful that the other boat does not become
stranded in the same shallow water. It may be necessary for the other boat to
put out an anchor to keep her clear. Be sure that both boats have deck fittings
that can withstand the strain of the pull. Typical recreational boats may not
have such hardware.
If a pull is made, keep all persons away from the line and beyond the ends of the
line in both directions. Various types of lines stretch to different degrees, but all
stretch enough to act as slingshots if they break or if fittings pull out. Serious
injury, or even death, are possible results of such failures.
Even if the other boat cannot pull to get you off, she may help by running back
and forth and making as large a wake as possible. The waves formed in this
wake may lift your boat enough to get her off. You should use this technique
only where the bottom is soft enough to cushion your underbody. A sandy
bottom would probably be okay, but you don't want to be heaving up and down
on rock.
I would encourage any boater to join one of the commercial towing
organizations. However, you should check with other boaters in your area for
recommendations as to which one to join. Ask what kind of service they have
received from the company. Trust me, they are not all created equal.