Barge

These settings apply to True-scale display of a composite or towed barge. Parameters are included for controlling the size of the barge and whether it is composite or towed.

With the composite option, the barge is simply placed directly in front of Own-Ship and remains fixed there.

When towed, you can select the length of the tow line and the method of simulation. The default is to assume the barge follows the path of Own-Ship. The other option is to assume the tow line remains straight. Neither case should be considered an accurate representation of the motion of the barge. Elements such as resistance of water, momentum, current, collision with Own-Ship/barge, etc are not simulated.

The depiction of the barge is not included in many elements of SEAiq, including:

• Swept path: Barge is not included in swept path.
• Monitoring of Safe Water: barge is not incorporated into this.
• Docking aids: no calculations are made for barge.
• Current: may not be accounted for in calculating position of barge.
• Follow Mode: does not account for barge when positioning Own-Ship.
• AIS Sharing / Hi-Res PPU: the barge is not Follow Mode: does not account for barge when positioning Own-Ship.

Settings

• Show Barge (Only SEAiq Pilot) : Enables to turn on display of barge when in True-scale.
• Length : Length of the barge.
• Width : Width of the barge.
• Attachment : Method of attachment to barge, tow line or composite. When towing, the barge is shown a certain distance behind Own-Ship. When composite, the barge is shown in front of Own-Ship.

Towing

• Line Length : Length of line for towing barge.

• Line Simulation : Select the method of calculating position of towed barge. This affects barge position when Own-Ship is turning.

  • Curved: assume that the barge follows the same path as Own-Ship. When Own-Ship is turning then the barge will be turning on the same circle. An abrupt change in ROT can cause the barge to jump to the side. Of course, this does not match how a barge moves. Advantages of this option include that it gives very predictable results. Also, it gives repeatable results when jumping backwards/forwards during playback of a recording. The barge will only be displayed when Own-Ship is moving at least 1kn.
  • Straight: use a straight line and incorporate history of Own-Ship movement to track the position of the barge. This motion may be more realistic than a curved line. A disadvantage of this approach is that the barge may have strange motion when jumping forward/backward during playback of a recording.

  Important: neither method is intended to accurately predict the movement of the barge.