Layer Estimates:

Layer: Piers (ID:0)
Count: 154
Extent:

XMin: 546846.3434
YMin: 858931.7871
XMax: 667921.0247
YMax: 958539.859300001
Spatial Reference: 2157 (2157)

Layer: Navigation Beacons (ID:1)
Count: 189
Extent:

XMin: 559228.7272
YMin: 858930.335000001
XMax: 634316.1101
YMax: 945458.9625
Spatial Reference: 2157 (2157)

Layer: Lighthouses (ID:2)
Count: 11
Extent:

XMin: 546280.899399001
YMin: 869098.638799001
XMax: 668140.227601
YMax: 965179.402800998
Spatial Reference: 2157 (2157)

Layer: Lighted Bouys (ID:3)
Count: 21
Extent:

XMin: 567508.5185
YMin: 868796.577099999
XMax: 713881.9375
YMax: 951365.4101
Spatial Reference: 2157 (2157)