var mainlands = ee.FeatureCollection('projects/sat-io/open-datasets/shoreline/mainlands');
var big_islands = ee.FeatureCollection('projects/sat-io/open-datasets/shoreline/big_islands');
var small_islands = ee.FeatureCollection('projects/sat-io/open-datasets/shoreline/small_islands');

Map.setCenter(-4.843, 51.392,6)
Map.addLayer(ee.Image().paint(mainlands,0,3), {"palette":["008000"]}, 'Shoreline Mainlands')
Map.addLayer(ee.Image().paint(big_islands,0,3), {"palette":["0000FF"]}, 'Shoreline Big Islands')
Map.addLayer(ee.Image().paint(small_islands,0,3), {"palette":["FF0000"]}, 'Shoreline Small Islands')