Haapalah / Aliyah Bet

Yosef Dror's family settled in Bat Yam בת ים, and he joined Hapoel Tel Aviv Naval Club Tel Aviv מועדון הימייה של הפועל תל אביב.

Yosef Dror served in C Company.

In 1946, HMCS Norsyd and her sister ship, HMCS Beauharnois, were purchased by the FB Company, when they were put up for sale as war surplus.
Palyam.org cites: both 'vessels were made serviceable for crossing the Atlanticat a shipyard in Staten Island."

In the Book of the Palmach, Yochai Bin Nun cites the Palyamniks active in haChulya:
* Shlomo Kimchi
* Moshe Nachshon
* Izzy Rahav
* Gershon Karlinsky Agmon
* 'Gideonchik' Rosen
* Shaul Aharonov Oren
* Yossale Huber Dror
* Ossie Shmukler Ravid
* Moshe 'The Redhead' Chadad
* Misso Abarbanel
* Yehuda 'Pere' Ben-Tzur
* Yoske Romanovsky Rom
* Eliyahu 'Garbo' Glaser
* Yigal Weiss
* 'Eskimo' Aharon Ben-Yosef
* Meirke Avraham
* Chaim 'Vinkie' Vinkler
* Uzi Sharon
* Avraham Chen
* Yona Fodor
* Benny Kravitz
* Gideon Vaadi
* Gavriel 'Gavrosh' Rapaport

On the night of November 16, 1945, Berl Katznelson ברל כצנלסון דמטריוס sailed from Lavrion Λαύριο, carrying 211 passengers, almost all Greek, and many from Corfu Κέρκυρα.
Amutayam.org.il cites Berl Katznelson ברל כצנלסון דמטריוס sailed on November 17, 1945
Palyam.org cites Berl Katznelson ברל כצנלסון דמטריוס was prepared in Pireaus Πειραιάς, and sailed from on November 16-17, 1945
Ninian Stewart cites: Berl Katznelson ברל כצנלסון דמטריוס sailed from Athens Αθήνα carrying 200 passengers.
Moshe Rabinovitch served as Palyam פלי"ם Commander מפקד aboard Berl Katznelson ברל כצנלסון דמטריוס.
Aryeh 'Kippy' Kaplan served as Palyam פלי"ם Escort מלווה aboard Berl Katznelson ברל כצנלסון דמטריוס.
Yosef 'Yosele' Dror served as Palyam פלי"ם Escort מלווה aboard Berl Katznelson ברל כצנלסון דמטריוס.
Yedidia Zafrir ידידיה צפריר served as Gidoni גדעוני, wireless radio operator, aboard Berl Katznelson ברל כצנלסון דמטריוס.
She sailed with a crew of 5 Greek seamen, incliding Captain Mitzis, a mechanic, a 1st Mate, a 2nd Mate and a Mate.

Yosef 'Yosele' Dror served as Palyam פלי"ם Escort aboard Berl Katznelson ברל כצנלסון דמטריוס.

Aryeh 'Kippy' Kaplan served as Palyam פלי"ם Escort מלווה aboard Berl Katznelson ברל כצנלסון דמטריוס.

Moshe Rabinovitch served as Palyam פלי"ם Commander מפקד and Escort מלווה aboard Berl Katznelson ברל כצנלסון דמטריוס.

Yedidia Zafrir served as Gidoni גדעוני, wireless radio operator, on board at Berl Katznelson ברל כצנלסון Demetrius.

On December 31, 1946 haMaapil haAlmoni המעפיל האלמוני sailed from Sweden Sverige to Marseille with no Maapilim aboard.
Yossele Dror served as Palyam Commander aboard haMaapil haAlmoni המעפיל האלמוני.
Reuven Oren served as Gidoni גדעוני, wireless radio operator aboard haMaapil haAlmoni המעפיל האלמוני.

Yossele Dror served as Palyam Commander aboard haMaapil haAlmoni המעפיל האלמוני, when she sailed from Sweden Sverige.

Reuven Oren served as Gidoni גדעוני, wireless radio operator aboard haMaapil haAlmoni המעפיל האלמוני, when she sailed from Sweden Sverige.

On December 31, 1946 haMaapil haAlmoni המעפיל האלמוני sailed from Sweden Sverige to Marseille with no Maapilim aboard.
Yossele Dror served as Palyam Commander aboard haMaapil haAlmoni המעפיל האלמוני.
Reuven Oren served as Gidoni גדעוני, wireless radio operator aboard haMaapil haAlmoni המעפיל האלמוני.

Yossele Dror served as Palyam Commander aboard haMaapil haAlmoni המעפיל האלמוני, when she sailed from Sweden Sverige.

Reuven Oren served as Gidoni גדעוני, wireless radio operator aboard haMaapil haAlmoni המעפיל האלמוני, when she sailed from Sweden Sverige.

The Palyam פלי"ם‎ No. 8 Boat Commanders' course, held iIn the summer of 1947:
Commander:
* Yossi Dror; relieved by Yisrael Auerbuch
Leader:
* Avraham Botzer
Attendees:
* Zalman Abramov

In the summer of 1947, Zalman Abramov attended the 8th Boat Commanders' course of the Palyam פלי"ם.

Amnon Yona cites Yosef Dror going to Bari to plan the sabotage of SS Lino.

Iin 1950, Yosef Dror retired from the IDF, but returned in 1956, at the request of Corps Commander Shmuel Tankus. to build Israel's submarine fleet.

In 1963, Yosef Dror retired from the Navy חיל הים with the rank of lieutenant colonel סגן אלוף, and went on to complete his education and serve as Captain in the Merchant fleet צי סוחר.