95c466b3__And_Cooling___Thermal_Systems__Advantages
[Geothermal Loop Type] Submerged Closed-Loop [Disadvantages] Submerged loops are likely to require more regulatory permitting than buried closed-loop systems; unless properly marked, can be damaged by boat anchoring. [Advantages] 
Can require the least total pipe length and can be the least expensive of all closed-loop systems if a suitable water body is available.
Geothermal Home Heating And Cooling - Thermal Systems
Advantages