User's guide for the ACS : automated listing and mapping instrument, version 4.1.1.5.

Shipping list no.: 2003-0270-P.

Synopsis of sundry decisions of the Treasury Department on the construction of the tariff, navigation, and other acts, for the year ending ...

Title varies slightly.

A treatise on navigation and nautical astronomy.

Mode of access: Internet.

Inspection of fishing vessels. Hearings before the Committee on Merchant Marine and Fisheries, House of Representatives, Seventy-seventh Congress, first session, on H.R. 3254, a bill to safeguard and protect further the lives of fishermen at sea and to place fishing boats under the supervision of the Department of Commerce, Bureau of Marine Inspection and Navigation, and for other purposes. October 14, 23, 24, 1941.

Schuyler Otis Bland, chairman.

Waiving navigation and vessel-inspection laws. Hearing before a subcommittee of the Committee on Commerce, United States Senate, Seventy-seventh Congress, first session, on H.R. 5111, an act authorizing the waiver of the navigation and inspection laws during the national emergency. September 17, 1941.

Mode of access: Internet.

Waiving Navigation and Inspection Laws : Hearing before the Committee on the Merchant Marine and Fisheries, House of Representatives, Seventy-seventh Congress, first session, on H. R. 5111, a bill authorizing the waiver of the navigation and inspection laws during the national emergency. July 1, 1941 ...

Schuyler O. Bland, chairman.

Marine laws : navigation and safety /

Mode of access: Internet.

Rivers and canals; the flow, control, and improvement of rivers and the design, construction, and development of canals both for navigation and irrigation, with statistics of the traffic on inland waterways;

Paged continuously.

Surveying and mapping.

No longer available via Internet.

Air navigation and meteorology.

Mode of access: Internet.

Biologically inspired visual landmark processing for simultaneous localization and mapping

This paper illustrates a method for finding useful visual landmarks for performing simultaneous localization and mapping (SLAM). The method is based loosely on biological principles, using layers of filtering and pooling to create learned templates that correspond to different views of the environment. Rather than using a set of landmarks and reporting range and bearing to the landmark, this system maps views to poses. The challenge is to produce a system that produces the same view for small changes in robot pose, but provides different views for larger changes in pose. The method has been developed to interface with the RatSLAM system, a biologically inspired method of SLAM. The paper describes the method of learning and recalling visual landmarks in detail, and shows the performance of the visual system in real robot tests.

Hippocampal models for simultaneous localisation and mapping on an autonomous robot

To navigate successfully in a novel environment a robot needs to be able to Simultaneously Localize And Map (SLAM) its surroundings. The most successful solutions to this problem so far have involved probabilistic algorithms, but there has been much promising work involving systems based on the workings of part of the rodent brain known as the hippocampus. In this paper we present a biologically plausible system called RatSLAM that uses competitive attractor networks to carry out SLAM in a probabilistic manner. The system can effectively perform parameter self-calibration and SLAM in onedimension. Tests in two dimensional environments revealed the inability of the RatSLAM system to maintain multiple pose hypotheses in the face of ambiguous visual input. These results support recent rat experimentation that suggest current competitive attractor models are not a complete solution to the hippocampal modelling problem.