How to read the ledger
The Service Ledger records only milestones whose date precision matches the source. A year remains a year. A period remains a period. That may look modest beside a day-by-day track, but it is more useful than false precision because each row tells the reader what kind of evidence supports it.
What the first release covers
The opening chronology follows construction, commissioning, early assignments, the Sasebo and western Pacific context, the Market Time period, and late-service status. It is designed as a route index: select an event, read the evidence note, then continue to the longer explanation of the setting.
Where the ledger can grow
Deck logs and finding aids may later refine dates or movements. Any revision should update the event record first, then regenerate the dependent pages. A correction is part of the research system, not an embarrassment hidden below it.
Construction and entry into service
The first ledger sequence is unusually precise because the official ship history supplies full dates: keel laid on February 26, 1953; launch on August 21, 1954; reclassification to MSC-199 on February 7, 1955; commissioning on April 29, 1955. These entries are separate because each describes a different administrative or physical stage in the vessel's life.
The early service note records Phoebe as a schoolship for crews preparing for Whippoorwill and Widgeon. On January 6, 1956, it became flagship of Mine Division 31, Mine Squadron 3. The westward movement then has three supported points: departure from Long Beach on March 4, arrival at Yokosuka on April 4 and transfer to Sasebo on April 10.
Operational milestones without false precision
The Naval History and Heritage Command summary describes eight years of minehunting and mine-warfare tactics with the Seventh Fleet after the move to Sasebo. It names port calls and exercises across Japan, Taiwan, Korea, Okinawa and the Philippines. The ledger retains that regional level unless a deck log or dated report can establish a particular day's position.
For 1965, the official history states that Phoebe spent five months on Market Time patrol, covered 24,000 miles and operated as far west as Bangkok. It records further Market Time assignments in March and November 1967. In September and October 1968, another patrol included the boarding of 201 junks, a ship-specific number that should not be confused with operation-wide totals.
The late-service record
The same summary places Phoebe in a United States-Japan mine exercise in February 1968 and a United States-Korea exercise in November. It still describes the ship as based at Sasebo late in 1969. Those entries show continued activity, but they do not by themselves establish every administrative step that followed.
A separate Naval Sea Systems Command inactive-ship history records MSC-199 with a removal date of September 3, 1976 and a disposition of scrap sale. The ledger treats that as a disposal record, not as proof of an exact decommissioning ceremony or date. Different event types stay in different fields so later evidence can refine one without rewriting the rest.
Research worksheet
Put this method to work
Every ledger row carries a status. 'Documented' means the cited source states the event. 'Derived' means a transparent calculation, such as duration between two supported dates. 'Open' marks a question with no published answer yet. A row never becomes documented merely because several websites repeat it. The public timeline can remain concise while the underlying record preserves locators and notes. That separation lets readers scan the chronology without hiding the evidentiary work needed to maintain it.
Continue the research
Follow the evidence into the next question
Read the patrol entries beside the Market Time account to separate ship evidence from operation context.
The Sasebo sequence gains context in the home-port guide, without inventing a pier-side scene.
To refine a year into a day, follow the deck-log method and preserve the page-level citation.