Shoaling - Depths in the entrance channels to Del Mar (Pendleton) Boat Basin and Oceanside Harbor are subject to frequent change due to continuous shoaling.   Latest available depth information may be obtained from the Public Works Officer, Camp Pendleton California.  The position of buoys located in Oceanside Harbor and Del Mar ( Pendleton) Boat Basin are approximate and are subject to being shifted due to frequent change of channel conditions.   Local knowledge is required for safe navigation in these areas.