Many dive websites in well-liked areas for scuba diving have lake balls out there for dive boats to make use of. These mooring balls present fast and quick access to dive websites and forestall anchor injury to generally delicate habitats comparable to coral reefs. Nevertheless, they require upkeep and are costly to put in, so not all areas divers go to have mooring techniques out there. There are a number of different methods to safe a dive boat over a website, relying on the kind of dive website, the climate situations and the kind of dive. Conventional anchoring, mooring and reside crusing are the three several types of methods submersibles can keep stationary whereas divers are aground.
Many new boaters underestimate the significance of getting the correct quantity of fine 5/16″ chain between the road and the anchor and an ample quantity of line within the anchor locker. The overall rule of thumb is that there needs to be 1′ of chain for each foot of size general ( LOA) of the ship. The chain basically makes the anchor extra prone to drag alongside the ocean flooring somewhat than be lifted at an angle, dramatically growing holding energy and the attain required to carry is gotten smaller with out dragging. the nylon line has a specific amount of elasticity that may act as a type of shock absorber for wave motion in tough seas. One other great tool for divers to make use of when anchoring over a website is a “Carolina” anchor rig”. line beginning on the stern of the dive vessel descends to not less than 10′ after which runs ahead to the anchor line, sloping deeper and deeper till it’s tied at about 20′. permits divers to descend beneath wave motion instantly upon getting into the water and offers a line to drag themselves ahead if the floor present is simply too difficult or straining. It additionally permits divers to unfold out as they floor and make decompression or full security stops. A last drawback saving system is the “anchor-ball” retrieval system. Primarily, a big diameter buoy is connected to a metal ring fitted across the anchor line. When it is time to recuperate the anchor, the vessel merely pulls ahead about 30* from its bearing at anchor and the metal ring pulls the anchor vertically to the floor as the road passes via till the anchor is on the floor and its flukes are outdoors the ring. Now a crew member can merely pull the floating anchor in as a substitute of pulling it from the underside. This can be a nice system if the dive boat does not have a windlass to do the heavy lifting. The one downside to this restoration system is that it shouldn’t be used if the location is a excessive reduction wreck or reef because the lifting anchor might snag.
Submersibles might need to anchor in order that the vessel is instantly over the location or the anchor could be very near the location. To anchor above the situation, a vessel should strategy from the wind/present (often the identical route within the Gulf of Mexico). When the boat has reached the situation, the captain ought to mark the situation with a pitcher or orient himself through the GPS chart plotter after which pull ahead 100′ to 150′ into the wind/present and drop anchor as soon as the engines are out and the ahead momentum has stopped. Because the boat drifts backward towards the buoy, the road needs to be set free slowly and a few pressure utilized to forestall the anchor from “deal with” fouling itself. As soon as the anchor is ready, extra line might be solid to get nearer to the buoy if essential. Now divers can merely leap off the again of the boat and descend via the buoy line. This methodology is nice for big websites which are out of energy. The principle drawback of this fashion is that divers would not have a strong line to carry on to throughout a security cease and should management their buoyancy whereas utilizing the road for visible reference solely.
By dropping anchor close to the location, the divers can use the anchor line as a sturdy descent line to the location and again to the dive boat. Including the Carolina rig is right for combating floor present fatigue and lowering diver anxiousness by getting divers beneath the wave motion and protecting them away from the bow of the dive vessel which may bob dangerously (to a diver on the floor) in vital wave motion. To place the anchor close to the situation, it’s best to motor in opposition to the wind/present till the specified location is clearly seen on the underside machine after which take the boat out of substances. Because the present pushes the boat backward away from the location, the anchor needs to be dropped shortly after the location is not seen on the underside machine. Now when divers descend to the spot it can seem in entrance of them, and if it isn’t instantly at anchor it is going to be a brief dive in the identical route forward. This anchoring system is most well-liked when anchoring in troublesome situations or in sturdy currents, as divers might not discover the anchor till they should ascend. They should floor in entrance of the boat and the present will simply carry them to the again of the boat. The drawback of anchoring with both system is that situations can change, comparable to currents or wind instructions, which may trigger the anchor line and boat to maneuver relative to the situation. Even worse, generally anchors simply drag via unfastened sediment or not sufficient sediment and the diver can return to the place the anchor was solely to see a drag line within the sand!
The answer to anchor resistance is a “tie-in” system the place the situation turns into the anchor. To “tie” a dive boat you want an skilled diver, 10-15′ chain and an anchor line not less than twice so long as the dive website is deep with a buoy on the alternative finish to the chain. The boat sails in place above the (once more in opposition to the wind/present) shipwreck or synthetic reef the place the chain might be wrapped round a strong level and tied right into a binding knot. The diver plunges in, finds the proper attachment level and secures the road to the situation. At this level both a tug system can be utilized to inform the road tender that the knot has been tied or the entire line has already been solid off the sub because it stands a protected distance away ready for the diver to return to the floor close to the buoy . Whereas this technique requires an skilled diver who might must spend some dive time working (somebody may even must untie), it’s the most secure manner to offer an absolute line to the wreck that won’t drag. In case of sturdy currents, a Carolina rig will also be used on this technique. Much less area is required for this methodology of staying over a dive website and a number of other boats can dock on the identical wreck on the identical time, supplied they’ve communicated adequately with one another, as you can not anchor on a dive website when divers are already within the water. That is the strategy North Gulf dive charters use on well-liked wrecks to maximise security and share the websites with others.
A last methodology of getting divers onto a spot is to not anchor in any respect, however somewhat use a ‘reside boat’. Reside boating is most well-liked for big websites, drift dives and coral reefs with out mooring techniques. Primarily, the boat merely pulls over the location or upstream from the location and the divers enter negatively buoyant and descend in a fast however managed method. A marker buoy can be utilized as a visible assist for the boat and divers so long as the situation is just not at risk of being broken by the heavy weight. Divers can tow a floor flag or carry inflatable floor marker buoys and audible indicators comparable to a storm whistle or dive warning. Divers are free to swim wherever they need beneath this no-anchoring system, with out the effort of a line to maintain up with. Reside boating is most well-liked when divers have numerous floor to cowl or restricted backside time. Dive operations off the SE coast of Florida generally use this methodology due to the excessive currents there. Divers must be more adept on this methodology and carry extra tools, however they’ll have extra freedom in the course of the dive. The dive vessel must monitor the bubbles fastidiously and maintain a vigilant look ahead to divers surfacing.
In abstract, there are many methods to get divers from a dive boat to a location and again once more. The situations, the character of the dive website and the ability of the divers will finally decide how the vessel should maintain up.