The list of ship commissionings in 1970 includes a chronological list of all ships commissioned in 1970.

	Operator	Ship	Flag	Class and type	Pennant	Other notes
20 January	Royal Australian Navy	Swan		River-class destroyer escort	DE 50
4 February	United States Navy	Finback		Sturgeon-class submarine	SSN-670
12 February	Royal Navy	Scylla		Leander-class frigate	F71
27 February	Royal Danish Navy	Narhvalen		Narhvalen-class submarine	S320
7 March	Royal Navy	Norfolk		County-class destroyer	D21
29 April	United States Navy	Flying Fish		Sturgeon-class submarine	SSN-673
29 April	Rederi AB Slite	Apollo	Sweden	Ferry		For Viking Line traffic
2 May	German Navy	Rommel		Lütjens-class destroyer	D187
24 May	United States Navy	Inchon		Iwo Jima-class amphibious assault ship	LPH-12
6 July	Svea Line (Finland)	Fennia	Finland	Ferry		Transferred from Siljarederiet; continued in Silja Line traffic
9 July	Royal Navy	Achilles		Leander-class frigate	F12
14 July	Royal Navy	Antrim		County-class destroyer	D18
18 July	United States Navy	Blakely		Knox-class frigate	FF-1072
7 August	Royal Canadian Navy	Preserver		Protecteur-class replenishment oiler	AOR 510
9 August	Rederi Ab Sally	Viking 1	Finland	Ferry		For Viking Line traffic
14 August	United States Navy	Trepang		Sturgeon-class submarine	SSN-674
22 August	United States Navy	Whipple		Knox-class frigate	FF-1062
September	SF Line	Marella	Finland	Ferry		For Viking Line traffic
1 December	United States Navy	Badger		Knox-class frigate	FF-1071
12 December	United States Navy	Ouellet		Knox-class frigate	FF-1077
22 December	Royal Danish Navy	Nordkaperen		Narhvalen-class submarine	S320
28 December	Soviet Navy	Admiral Isakov		Project 1134A Berkut A large anti-submarine ship
31 December	Soviet Navy	Bditelnyy		Project 1135 large anti-submarine ship	500