Project Sanddollar
Project Sanddollar was a highly compartmented US Navy program to identify and retrieve items of national security interest from the seafloor, operating as a covert sub-program nested within the Polaris submarine-launched ballistic missile program. Its existence is documented in The Silent War: The Cold War Battle Beneath the Sea (2001) by Dr. John P. Craven, the Navy's Chief Scientist for Special Projects and a foundational figure in US deep submergence technology. Craven was briefed into Sanddollar in 1965 by a naval intelligence officer; even Craven's own staff was not to know where he was going or with whom he was meeting.
Discovery and Structure
Craven was initially brought in by a well-known submarine officer whose involvement with the Polaris program Craven later learned was itself a cover for Sanddollar. When briefed, Craven learned that Sanddollar was nested within a complex web of programs hidden under the Polaris SAP umbrella — Polaris led to several layers of cover programs, which led to Sanddollar. Craven described being shown an inventory of items known to be on the seabed and a map of their worldwide distribution, and asked whether he could organize and manage a recovery program using DSSP (Deep Submergence Systems Project) assets, while conducting operations in a manner that his "family, friends, and closest professional colleagues would have no idea" he was involved.
This architecture — a compartmented recovery program nested within a cover program under a tier-one SAP umbrella — exactly mirrors the SAP tier-1/tier-2/tier-3 structure codified in DoD Directive 5205.07: an umbrella containing compartments, containing sub-compartments. Craven himself articulated a similar conceptual framework, describing what he called the "seventh veil" — an apparatus of secrecy surrounding top-secret unacknowledged programs in which one could never be certain of reaching the innermost layer of compartmentation.
Connection to UFO Legacy Programs
UAP Gerb identifies Sanddollar as highly likely to have been a maritime UFO crash retrieval program. The Navy's DSSP, which Sanddollar used as its operational cover, developed Deep Submergence Rescue Vehicles (DSRVs) and Deep Submergence Search Vehicles (DSSVs) capable of reaching previously inaccessible ocean floor depths. The channel has discussed witness testimony from a DSRV crew member who claimed in 1991 to have retrieved an exotic triangular craft with glyphic writing from the seafloor off Aberdeen, Scotland — consistent with the types of operations Sanddollar was equipped to conduct.
Craven's description of Sanddollar in Chapter 10 ("Spooked") of The Silent War is cited by UAP Gerb as one of the most poignant independent articulations of the legacy program onion architecture: all special intelligence projects required a real cover project; most people working on the cover project did not know it was a cover; and one or more individuals cleared for both levels served as links between the projects.
Significance as Precedent
Project Sanddollar serves as the naval precedent for UAP Gerb's broader thesis about UFO activities nested within cover SAP umbrellas. Just as Sanddollar was hidden within Polaris, UAP Gerb argues that UFO-related Army activities were hidden within the Yellow Fruit SAP umbrella, and similar structures likely existed within Air Force and NRO programs. The structural architecture is identical: a benign-appearing umbrella program provides the SAP cover; the actual mission is contained in nested sub-compartments accessible only to a handful of individuals cleared for both levels.