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9. Baited lure: The lander can be used to lure animals to- wards its position by the use of bait. Low-light cameras using red LEDs can image animal behavior without disturbance, or await the arrival of an ROV or manned submersible; 10. Scout: Landers can precede a manned submersible or

ROV operation to determine a speci? c area of interest. They can also stand-by as a rescue vehicle, using their full buoy- ancy to help bring another vehicle back to the surface; 11. Pack horse: Working with manned or unmanned ve- hicles with mobility but limited VB to carry samples, a lander can act like a chest-of-drawers to hold the samples collected by the mobile craft. The mobile craft is recovered ? rst, and the lander is recalled with its payload to the surface afterwards; 12. Cheap anchors: Only scrap iron is needed for anchors, so the ballast weight may be purchased in the port of opera- tion, saving the cost of shipment of a heavy drop weight;

During COVID, when barbell weights became very expensive and hard to ? nd, the idea came to make ferrocement anchors, replacing the gravel with readily available scrap steel stamp- ings. The scrap stamped steel was valued at 4 cents/pound. The anchor worked great, and would later corrode and dissolve into ocean friendly materials. Non-magnetic SS stampings are like- wise available, if magnetic signature is an issue.

Subsea Expo 22 - 24 February 2022, Aberdeen

Stand 10

Kevin Hardy

Pressure compensated

Figure 5. and energy efficient

Ferrocement expendable anchors, where steel maxon thruster and actuators stampings replace coarse gravel in the mix. Cheap,

Max. depth limit of up to 6,000 meters heavy, and biodegradable.

High energy efficient of minimum 80 percent

Long service life of up to 1,000 operation hours aquaticsolutions.maxongroup.com

Precision Drive Systems www.marinetechnologynews.com

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