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2. Sea anchor - Wikipedia

   en.wikipedia.org/wiki/Sea_anchor

   A conical sea anchor with tripline (from an illustration in The Sailors Handbook by Halsey C. Herreshoff). An early wooden drogue. A sea anchor (also known as a parachute anchor, drift anchor, drift sock, para-anchor or boat brake) is a device that is streamed from a boat in heavy weather. Its purpose is to stabilize the vessel and to limit ...

3. Mooring (oceanography) - Wikipedia

   en.wikipedia.org/wiki/Mooring_(oceanography)

   The weight is released by sending a coded acoustic command signal and stays on the ground. Deep water anchors are typically made from steel and may be as large as 100 kg. A common deep water anchor consists of a stack of 2–4 railroad wheels. In shallow waters anchors may consist of a concrete block or small portable anchor.

4. Offshore embedded anchors - Wikipedia

   en.wikipedia.org/wiki/Offshore_embedded_anchors

   Water is then pumped from the interior of the caisson to create a vacuum that pushes the plate anchor underneath to the desired depth (Step 1). The plate anchor mooring line is then disengaged from the caisson, which is retrieved by water being forced into the caisson, causing it to move upwards whilst leaving the plate anchor embedded (Step 2).

5. Breakwater (structure) - Wikipedia

   en.wikipedia.org/wiki/Breakwater_(structure)

   Breakwaters may also be small structures designed to protect a gently sloping beach to reduce coastal erosion; they are placed 100–300 feet (30–90 m) offshore in relatively shallow water. An anchorage is only safe if ships anchored there are protected from the force of powerful waves by some large structure which they can shelter behind.

6. Suction caisson - Wikipedia

   en.wikipedia.org/wiki/Suction_caisson

   Suction caissons (also referred to as suction anchors, suction piles or suction buckets) are a form of fixed platform anchor in the form of an open bottomed tube embedded in the sediment and sealed at the top while in use so that lifting forces generate a pressure differential that holds the caisson down.

7. Anti-Submarine Warfare Shallow Water Craft - Wikipedia

   en.wikipedia.org/wiki/Anti-Submarine_Warfare...

   In December 2013, the Defence Acquisition Council (DAC) –- the main acquisition panel subordinate to India's Ministry of Defence (MoD), approved the procurement of sixteen anti-submarine warfare (ASW) vessels capable of operating in shallow waters, at a cost of ₹ 13,440 crore (equivalent to ₹ 230 billion or US$2.6 billion in 2023), to replace the ageing Abhay-class corvettes of the ...