Based on the coordinates provided, the South Ramp boat ramp is located in Nebraska, specifically near the southwestern part of the state. Unfortunately, without further information or clarification, it is challenging to determine specific details about the ramp. However, based on the available information, it is possible to make some educated assessments.

Firstly, as it is a "boat ramp," it can be assumed that South Ramp is a place where boats can be launched into the water. Most likely, this ramp is a concrete or gravel surface that slopes down into the water, allowing boaters to back their trailers into the water and release their boats. It is also likely that there are parking spaces nearby where boaters can park their vehicles and trailers.

Secondly, the specific width of the ramp is unknown, although it can be assumed that it has been constructed to accommodate boats of varying sizes. Most boat ramps are at least 20 feet wide, with some as wide as 50 feet or more, to allow for multiple boats to be launched or retrieved simultaneously.

Thirdly, it is unclear what body of water the South Ramp boat ramp services. It could be a lake, river, or other waterway. However, based on the location of the coordinates, there are several bodies of water within reasonable proximity, including Lake McConaughy and the Republican River.

Finally, as for what kind of craft are permitted on the water, that is also uncertain without further information. However, many boat ramps allow a range of vessels, including powerboats, sailboats, kayaks, canoes, and other watercraft. It is possible that there are restrictions on the size or type of boat allowed on the water, such as limitations on speed or horsepower, or restrictions on certain activities like waterskiing or fishing.

In conclusion, based on the limited information available, it can be assumed that South Ramp is a boat ramp located in Nebraska that provides access to a body of water for a range of watercraft. However, further information would be required to provide more detailed specifics about the ramp's facilities, location, and permitted activities.