Nautilus Integrated Streamer Control Device

The 3-in-1 Sercel Nautilus® device provides acoustic positioning, depth control and automatic steering in one integrated unit. Nautilus regularizes the spread automatically to give better 3D coverage, and provides greatly improved 4D repeatability by combining this with feather-matching, depth control and more accurate steering to pre-plot positions.

The combination of Nautilus and the industry-leading Sentinel Solid Streamer® provides the quietest steered streamer available.

Nautilus provides options for great operational flexibility:

regularize spread to a designated master streamer
steer master and regularize rest of spread to follow
independent steering of any or all of the streamers


The Nautilus steering wings are clamped over the Nautilus node, which forms an integrated part of the streamer, reducing back deck handling and HSE exposure.	The unique Nautilus three-wing design provides the highest steering force in the industry.

Streamers on Autopilot: Nautilus in action in the Gulf of Mexico, providing autonomous spread control to improve efficiency and data quality. In the Gulf of Mexico streamer tail separations can vary from nominal by +/- 20m. With Nautilus this is reduced to +/- 2m.

Features

Benefits

Single integrated unit, purpose-designed for Sentinel streamers, providing:
- Streamer positioning with full acoustic bracing
- Streamer depth control
- Streamer steering
Streamer powered
Automatic regularization of streamer separation and depth
Advanced acoustic network provides accurate positioning along the full length of the streamer
Redundant telemetry and power supply systems
Advanced hydrodynamic design provides powerful steering

Safer
- No routine lithium battery shipments
- Fewer workboat trips so less in-water HSE exposure
- Safer operations near offshore installations
Quieter
- Fewer devices on streamer
- Quieter when steered due to reduction of the vortex on front side of streamer caused by crossflow.
Better
- Improved 4D repeatability
- Improved full streamer positioning
- Reduced infill due to uniform streamer shape
- Better control of denser streamer spreads


The Nautilus node contains all the acoustic, depth and steering electronics. The wing assembly is a mechanical interface only, which clamps onto the node for easy and safe installation. The patented three control surface design and linkage provides maximum steering power and stability with minimum streamer noise, all optimized specifically for seismic acquisition speeds (5 knots).