NOAA NOS Hydrographic Survey Data

The NOAA NOS Hydrographic Survey Data dataset is consumed from an external ArcGIS web service via the following URL and ID

https://gis.ngdc.noaa.gov/arcgis/rest/services/bag_hillshades/ImageServerImage
ID: 

OpenLayers

If you are developing in OpenLayers, you will want to use the OpenLayers ArcGIS93Rest class. An example of your solution might look similar to the code below.

layer = new OpenLayers.Layer.ArcGIS93Rest(
    "NOAA NOS Hydrographic Survey Data",
    "https://gis.ngdc.noaa.gov/arcgis/rest/services/bag_hillshades/ImageServer/exportImage",
    {
        layers: "show:",
        transparent: true
    },
    {
        isBaseLayer: false
    }
);
map.addLayer(layer);