The interpretation timeline
Luke 5:4 Douay-Rheims

Now when he had ceased to speak, he said to Simon: Launch out into the deep, and let down your nets for a draught.

A.D. 390 – 1871 9 witnesses 14 excerpts

Patristic

before A.D. 750
390
A.D.
Ambrose of Milan Patristic
A.D. 339–397
“Lastly, though to others it is commanded, Let down your nets, to Peter alone it is said, Launch out into the deep, i. e. into deep researches. What is so deep, as the knowledge of the Son of God!”
“Now in a mystery, the ship of Peter, according to Matthew, is beaten about by the waves, (Matt. 8:24.) according to Luke, is filled with fishes, in order that you might understand the Church at first wavering, at last abounding. The ship is not shaken which holds Peter; that is which holds Judas. In each was Peter; but he who trusts in his own merits is disquieted by another’s. Let us beware then of a traitor, lest through one we should many of us be tossed about. Trouble is found there where faith is weak, safety here where love is perfect. Lastly, though to others it is commanded, Let down your nets, to Peter alone it is said, Launch out into the deep, i. e. into deep researches. What is so deep, as the knowledge of the Son of God! But what are the nets of the Apostles which are ordered to be let down, but the interweaving of words and certain folds, as it were, of speech, and intricacies of argument, which never let those escape whom they have once caught. And rightly are nets the Apostolical instruments for fishing, which kill not the fish that are caught, but keep them safe, and bring up those that are tossing about in the waves from the depths below to the regions above. But he says, Master, we have toiled the whole night and have caught nothing; for this is not the work of human eloquence but the gift of divine calling. But they who had before caught nothing, at the word of the Lord inclosed a great multitude of fishes.”
Source
“We may understand also by the other ship another Church, since from one Church several are derived.”
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“(Hom. 6. in Matt.) For in His condescension to men, He called the wise men by a star, the fishermen by their art of fishing.”
430
A.D.
A.D. 376–444
“Having sufficiently taught the people, He returns again to His mighty works, and by the employment of fishing fishes for His disciples.”
“Now this was a figure of the future. For they will not labour in vain who let down the net of evangelical doctrine, but will gather together the shoals of the Gentiles.”
“But Peter beckons to his companions to help them. For many follow the labours of the Apostles, and first those who brought out the writings of the Gospels, next to whom are the other heads and shepherds of the Gospel, and those skilled in the teaching of the truth.”
735
A.D.
Bede the Venerable Patristic
c. A.D. 672–735
“The net is broken, but the fish escape not, for the Lord preserves His own amid the violence of persecutors.”
“Or the other ship is the Church of the Gentiles, which itself also (one ship being not sufficient) is filled with chosen fishes. For the Lord knows who are His, and with Him the number of His elect is sure. And when He finds not in Judæa so many believers as He knows are destined to eternal life, He seeks as it were another ship to receive His fishes, and fills the hearts of the Gentiles also with the grace of faith. And well when the net brake did they call to their assistance the ship of their companions, since the traitor Judas, Simon Magus, Ananias and Sapphira, and many of the disciples, went back. And then Barnabas and Paul were separated for the Apostleship of the Gentiles.”
Source

Scholastic

c. 1100 – 1500
1107
A.D.
c. 1055–1107
“Peter did not refuse to comply, as it follows, And Simon answering said unto him, Master, we have toiled all night and have taken nothing. He did not go on to say, “I will not hearken to thee, nor expose myself to additional labour,” but rather adds, Nevertheless, at thy word I will let down the net. But our Lord, since he had taught the people out of the ship, left not the master of the ship without reward, but conferred on him a double kindness, giving him first a multitude of fishes, and next making him His disciple: as it follows, And when they had done this, they inclosed a great multitude of fishes. They took so many fishes that they could not pull them out, but sought the assistance of their companions; as it follows, But their net brake, and they beckoned to their partners who were in the other ship to come, &c. Peter summons them by a sign, being unable to speak from astonishment at the draught of fishes. We next hear of their assistance, And they came and filled both the ships.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Now when he had left speaking,.... Teaching the people, and preaching the word of God unto them out of the ship, as they stood on the shore before him. He said unto Simon, launch out into the deep; he spoke to Simon Peter, being the master of the vessel, to thrust it out, or put it off further into deep water, more convenient for fishing; and let down your nets for a draught; of fishes: his meaning is, that he would give orders to his servants, to put out the vessel to sea, to take their nets and cast them into the sea, in order to take and draw up a quantity of fish, which was their business.”
Source
1849
A.D.
1774–1849
“Epanagage eis to bathos . Put back from whence you have just now returned. Where you failed without Christ, with Christ you will prove successful. Now is the proper time, when you act in my presence, and according to my orders; before it was not, when you followed your own, and not my will. (Maldonatus) — St. Augustine interprets the text, Launch out into the deep, as spoken of distant nations, to whom the gospel was afterwards delivered: tolle signum in gentes, ad eas, quœ propè, et ad eas quœ longè. (Isaias v. 26. and xi. 12.)”
Source
1863
A.D.
1796–1863
“" Although the others are commanded to let down their nets, to Peter alone it is said: 'Launch out into the deep :' that is, into the depth of mystery. For what is so deep as the riches of divine knowledge, to know the Son of God, and to profess belief in His Divine Generation ■?— To this depth of mystery the Church is led by Peter." St. Ambrose.”
Source
1871
A.D.
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.