Feature group

Feature

Sigma

Cableless systems with only shootblind capability

Cableless systems with some data return capability

Benefit of feature and related issues

Stakeless surveys

True stakeless operations

Not always an option

Not always an option

Not all cableless systems can be used easily away from land.

Enhance cable operation

Yes

Not always an option

Not always an option

Marsh operations

Yes

Not always an option

Not always an option

Shallow water

Buoy option

Not always an option

Not always an option

Data and equipment security

Yes

No

Yes

Risk of losing data and equipment in shootblind operations.