Wreck Diver (Part 2) Basic Diving Techniques I

As a wreck diver there are many different techniques that you must consider. An attempt will be made here to bring out what would be consider basic techniques. They could be divided in the following sections. Keep in mind that what is written here is just the basics and a highlight of these techniques.

NAVIGATION AND EVALUATION

1. Follow the wreck's layout
Use natural lines to navigate, ie swim along the hull or along one side. Go up one side and back the other. If the wreck is fragmented, pick some prominent points and swim in a relative track. On occasion, look back to see what the return trip will look like.

A FANTASTIC underwater
photo of the
HILMA HOOKER.
A must see.


2. Establish a baseline for widely scattered wrecks
Use a compass heading and swim in that direction, being carefull to note that some compasses may not work if close to the metal hull of the ship. In low visibily or current, use you wreck reel tied off to a point as a return line to your starting point.


3. Evaluate the wreck for possible hazzards and stability
How is the wreck sitting ? Does it look stabile ? Look for sharp objects and entaglements. Check to see if walls and structure appear stong and intact. If considering to penetrate this wreck, check for possible entry ways that are free from hazards.

Click on the photos for more pictures about the Hilma Hooker.

DEEP WRECKS

1. Be a trained PADI Deep Diver.

2. Have proper deep diving equipment available
Hang a tank at 15 feet to assure ample air for a saftey stop. Set a reference line for orientation for descents and ascents. Have a first aid kit available.

3. Take the effect of nitrogen narcosis into account
Plan the dive to keep objectives at or below 100 feet. Avoid changing your dive plan on deep wreck dives. Stay close to your ascent point so if you need to come up you know where it is.

MAPPING

1. Use a large slate to draw more accurate details.
Note distances, angle, directions, depths, points fo interest. Try to make true to scale. The more accurate the better.

The Emerald

This is a sample of a wreck map. This is The Emerald wreck. See article here by the New Jersey Scuba Diver for more maps and history of this wreck.

2. Compass use
Use compass and navigational aids to determine angles between prominent points of the wreck.

3. Distance determination
Use kick cycles and arm spans to estimate size and distance. For more accurate measuraments, use a marked rope or measuring tape. (See the above link for a map grid of this wreck...this is a good site to study wrecks, esp on the east coast.)