Ship Movement Information Display System (SMIDS)
SMIDS is a new, digital docking system. Its accuracy and precision, ease of installation and its application make it a prime example of electronics innovation becoming available for commercial shipping.
SMIDS requires no dry-docking to install or replace, making it far more cost effective alternative to its Doppler predecessor.
Dopplers are the system used to measure a ship's speed and play an important role in docking manoeuvers. At least they used to be, as so many ships are no replacing them with SMIDS as they offer so many advantages.
Regular maintenance and all too often sensor replacement make Dopplers an expensive item, especially as dry-docking may be required.
Satellite systems are used for precision docking and close quarter manouevers; GLONASS/GPS receivers are used to independently measure all bow and stern movements in relationship to the Earth and providing a mean velocity of better than +/- 0.02 Knots.
A display unit, on the ship's bridge and wing, shows the heading, course, transverse speed and longitudinal speeds.
Two GPS satellite receivers are positioned on the bow and stern of the vessel. Satellite information received is integrated with the ship's gyroscopic heading data and the rate of change, as the ship moves is calculated, in relationship to the Earth, with the data decoded into understandable values port to starboard and forward to aft. The option is also available to fed data to such equipment as ECDIS, Radar and S-VDR.
Advantages of SMIDS