[Sdiver]

Yes the SK/7 from Suunto is a great digital compass. But don't fall into the trap of, just because you have the latest "bling", that you don't forget and stick with the basics.

Mug,
Not pointing a finger at you, this is just a general refresher for any and all who use a compass, whether U/W or Above Water/snorkeling.


When using a compass above water, while snorkeling or doing a surface swim...

1) Look at the conditions of the water and how and which direction the wind is blowing. Is there much of a chop? Can you tell which way the current is going? Can you see the surf breaking? If not, this will be something that you will want to take into accounting, the closer you get to shore.

2) Pick out a very distinguishable land mark. (I used to tell my students to pick out two.) I say distinguishable, because hotels/condos/buildings can all look the same the closer you get to shore. (that is, if you are doing pin point surface nav.) If you aren't doing pin-point surface nav, and are just attempting to get to shore, it is still advisable to pick out a land mark.

3) Once you have you land mark picked out, align your compass heading with that land mark. Mark it/lock it in, depending on which compass you're using.

4) Begin your swim on your heading.

5) After a set amount of time, whether you are using a watch or kick cycles to mark your time, after a set amount of time, stop where you are. Check your heading on your compass to the land mark(s) that you have picked out. Adjust accordingly. Repeat this process several times. Don't just trust in one or two or even three readings. Check, check, check, and re-check, over and over.

6) As you approach the shore, what are the conditions of the surf. Can you see any foaming water away from the beach? This could denote a sand bar or two. If so, there is most likely a rip tide/current between those sand bars. How are the waves "crashing" on shore? Adjust accordingly.

Remember, the best way to use a compass while on scuba/rebreather or even on snorkel is under water, and close to the bottom. You don't have to tend with the wind affecting you, and the currents are somewhat less towards the water's floor.